How about Aliens that actually look like Aliens and not a humanoid with a frog head.

I'm fine with the current batch of humanoid alien races, but it would be nice to see some more alien races that are different from all the others, like the Thalan are. Having a race of Dragons would be cool, a Feline race too I would love that.

Gasous aliens. Clouds of gases brought together by electro magnetic fields and that have developed intelligence.

I'd love a Felinoid race! Finally, racial images for my Terelains... or maybe having a go at doing a Kzinti Patriarchy faction to show the Drengin how to deal with weed-eating apes Uh... this time with both of us having Hyperdrive so our fleets don't get wiped out by the otherside randomly purchasing invulnerable hulls and FTL tchnology...

Um, you can always create a custom species in the game right? All I care about is if I can mod my species in, they can release the rest.

Who says we are not slaves to our pets??? I say we are. They really don't need thumbs. They use mind control.

Typically sci-fi has always had humanoid aliens just because its hard to make an audience become attached to a giant blob of goo as a meaningful character in a narrative. Gal Civ draws allot of its influences from TV sci-fi so  its hardly surprising.

 The main thing for me was that each race in Gal civ 2 had its own relatively distinct personality and to some degree, style of play. I would love to see each race made more unique. I also think that there should be different ways to win with each race and being locked into any one style of play is limiting i.e Bloodthirsty Conquest shouldnt be the only avenue that the Drengin tech tree and racial abillities force you down.

Really a big part of the different factions is the in game narrative they provide and 4x games that get this element right tend to be awesome-sauce (just look at Alpha Centauri).

So in think that rather than struggling to come up with some super cool and weird race the developers should focus on what they have first, then add new races only if they work in terms of their own unique personality and game play mechanics relative to the other races.

I'm with Ashbery76.  I'm so sick of humanoid aliens.

I want silicon based lifeforms (not straight up robots like the Yor), non-humanoid races, aquatic races, high/low gravity races, etc.

The problem with your request is really about symmetry. After all the research about what an alien would like look, from the ground up (USING) carbon the species needs graspers, movers and food input along with eyes. From an energy standpoint the typical humanoid is usually the best at efficiency. 

There was a good discussion on this from National Geographic on alien builds and symmetry which tied into the game Spore. For all intents the 1 head, 2 arms and 2 legs is the most energy efficient and typically most successful. 

That does not mean there are NO other types out there..

Yeah I did see the picture above. Looks like I think is the most creative looking alien Yet. Hey do you think it is some kind of insect. Other than hydrocloric acid instead of water I thought had a lot of insect qualities about it.

There were three other kinds of nucleic acids other than Dna and Rna that they found at the U of A, but all I can remember is peptides. They also think that sugar can work instead of proteins that they have discovered.

Well, if you want my answer, then might I suggest the Transhumans from the Eclipse Phase tabletop RPG? They are not technically aliens per se, but can serve more of an example of what an alien civilization might look like if they allowed technology to go a certain direction. Nearly every transhuman has been downloaded to a new body (either organic or synthetic) or currently resides in emergency data archives awaiting reactivation. Most bodies (or morphs as they call them) have some level of augmentation. The technology is quite advanced, but nothing that shouldn't be possible by our current understanding of science (so no FTL).

For a time, they thought themselves immortal, as they had the technology to download themselves to new bodies (so they could keep backups and upload to new bodies when the old one died or wore out) and had the means to modify bodies and even their minds (psychosurgery is still in its infancy in the setting). While there was plenty of controversy, a lot of that changed one day. Considering what the recursively improving intelligences known as the TITANs (Total Information Tactical Awareness Network) were doing on Earth (like forcibly uploading people) and the fact the Transhumans decided that things were bad enough that nuking Earth with antimatter weapons looked like a good idea, most of the survivors are those who made the mental leap needed to over come their problems with uploading themselves and escaped. Consequentially, a lot of people got over the idea that a copy isn't me and survived. Those who couldn't (or wouldn't) upload didn't make it.

I could go on, but long story short, those people who have serious problems with technology are a minority (though recursively improving intelligences is a big no no for most people). Most conservatives weren't lucky enough to get off Earth, or weren't lucky enough to be off Earth when things went sour. Consequentially, even the conservative factions have a level of technology and integration with said technology several steps beyond what you see in most sci-fi movies and shows. In many ways, they couldn't live without it. Its not like the conservative factions can exactly return to Earth to go live there as opposed to living on a rotating habitat in space, some place underground on the moon, or in a radiation shielded station orbiting planet Jupiter. Not being able to nanofab a part for life support is practically a death sentence when you might be 4 months (or more) space travel time away from a factory that could replace a given part.

If you want to go read more, then maybe you should go check it out. I suggest you do so since I'm not sure if I did it justice trying to explain it here. Its not a perfect world (it is meant to be a game that could be played, so there is conflict built into the setting), but I think its quite interesting.

http://tvtropes.org/pmwiki/pmwiki.php/TabletopGame/EclipsePhase?from=Main.EclipsePhase

http://eclipsephase.com/forum

http://robboyle.wordpress.com/eclipse-phase-pdfs/ <-- Some free downloads of the ebooks.

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Edit: More stuff. A video review, and some more comments.

http://www.youtube.com/watch?v=pyumYmxwyzE

While the default setting assumes that you will be playing as a member of a secret organization that fights for the continued survival of Transhumanity, the core rulebook does have sufficient details to play a different kind of game and play for other factions. You could for instance play a game where you were people who were protecting the interests of the "Morningstar Constellation" (the people of Venus who broke away from Planet Consortium). You could play as mercenary for a hypercorp (hypercorp are like megacorps, but with the computer power to do with a few dozen people what megacorps needed thousands of people to do).

Err... sounds like I'm trying to sell the book now, not answering what kinds of aliens you want to see. Maybe I should stop talking for now.