Mine is pic related, the Victory Gundam. What I like about it is how modular the mobile suit is. It's the result of years of ms tech late into the Universal Century where now the Gundam is mass produced. In the show the rebel forces are shown to have a stockpile of Gundams in a bunker so they can burn through parts.
Honorable mention to the RX-79 G ground type Gundam from 8th MS Team.
Show
It makes me feel such Rhythm Emotion.
Edit: ah yeah, that's the stuff.
https://yewtu.be/watch?v=4yqZF2rrfpk
As a kid I used to watch this Endless Waltz ad over and over (from a DVD or one of the PS2 games) because it had a snip of this scene and other dope stuff with Last Impression over it lol.