I would recommend Zeta Gundam but you can't just watch Zeta Gundam. You gotta go through the UC Timeline, which is a lot of material. But Zeta Gundam is frickin' amazing.

Gundam Wing works, though. Great show and movie.

Gundam SEED is...okay. It has a very bad start but man it gets really good.
Don't watch Destiny.

Zoids: Chaotic Century/Guardian Force is a lot more awesome than it has any right to be.

I prefer the Neon Genesis Evangelion manga to any of the animated works.

I watched this show called Vandread years and years ago. Big boobs everywhere and also robots.