My fave is...Doozybots!!!!
http://www.youtube.com/watch?v=e8um1N78AhYJust kidding, just kidding!!! But if anyone hasn't seen it, well, just, yeah. As an aside, I have several SD Gundam Kits, and I love 'em.
But on a serious topic, I haven't seen Gundam for a long time, but I've seen a lot of it. I like the UC series, mostly cause it's one very big interconnected story. Original Gundam is good, though technically I've never seen the series, only the "Movies". Those however are very, very well done. I have the original U.S. dub, and from my understanding, I'm not missing much from the original series. I should track it down someday though...
Zeta was pretty good, though it was just a little overhyped. There's nothing "wrong" with it, but it does have a bit of a slower pace, both in narrative and action at times.
Char's Counterattack is ok, but I preferred F-91.
Fave OVA? 08th MS Team, hands down. It has good action, character development, animation, music, etc. It's also really nice that it focuses on a small platoon that doesn't really change the war, and gives you that perspective. And if I was in the Gundam Universe, I would probably be most like McKell(I know I spelled that wrong).
0080 has grown on me, and 0083 has Unit 3, which I found awsome back in the day. I have the SD kit of it, and it's cool.
Gundam Wing was my first Gundam, so I have a bit of nostalgia for it. I did rewatch it some years back, and I suppose it hasn't aged as well as some of the others...
G-Gundam I really like if only for it's absurdity. I'll concur, it's not a traditional Gundam series, and shouldn't be measured against any other Gundam series. But as a Super Robot show, I like it. It's got a good plot, good characters, interesting fights, very good premise(I like the Tournament idea), and the mecha designs range from really cool to really out there. I suppose it is a little racist/sterotypical, but that never really bugged me. All in all, a good show if you take it as it is.
Seed I enjoyed very much, and though the first half IS the Original Gundam revisited, it really comes into it's own during the second half.
Destiny I've only seen half of, and it's been a long time.
Finally, who else has seen G-Savior? It's not the worst movie ever made, and the CG has aged well for what it is, but it's not a very Gundam-y movie.
So overall, I'm realizing that I am WAY behind in my Gundam watching. I need to get some official DVD's and relive some of these series.