I will be honest, after starting with Seed, then going to Wing and 00, only to find that it all started in different timeline with Mobile Suit Gundam and Zeta Gundam: I ran to the UC timeline like a little Zabi prince would after seeing the Federation making a push to his little corner of the milky way.
I love the UC timeline, and its continuity. Wing comes in second for consistency, Seed - 3rd for doing a fine job of retelling the first half of MSG, with a decent second half (also, I hate lacus, I hate so very much).
Finally, Gundam 00, it's hate-love story. I hated the dialogues and the character designs. Their clothes were half-way some jpop boyz band and power rangers (I just couldn't take them seriously without the multi-colored and corny dialogues: I AM GUNDAM!), Hallelujah was a potentially decent character but didn't get enough screen or action time and was ... well ... a waste of space. While it had a decent story, the dialogues were dissapointing, there wasn't enough decent banter between the characters (guess that's what happen when you don't have a Char/Mwu on your crewship and you are stuck with angsty kids (lol feldt, talk you ... pinked hair wannabe cute girl). Ribonz was cool and evil, but the clothes man, .... the clothes!!! AAAAArgh, I can't bear it)
Unicorn is UC, so it's automatically good in my book. Not to mention the amount of detail in it, then again OVAs

0083 <3