[Urei]

Vote goes to Other and 00. Watched almost all of Tomino's works as well as the original series of late. Even though most of them were quite good, 00 will get my vote as it's unparalleled on many levels. Storytelling, characters and character development, world presentation and it's constant changing nature, politics and it's realism and most of all, depth. I'd take 'Char's Counterattack' as the best Gundam before 00.

EDIT. 0080 and 0083 as well as 8th MS Team. Forgot to mention those. It's a hard tie with 'Char's Counterattack'. Those series provided unique insight on different kinds of war. They have their own unique universe in which they shine.