I've played FFVI-VIII, X, X-2, and currently playing XII, so my decisions are based on those games...

1. Coolest Outfit - Amano's Locke is really nice
2. Most Practical Outfit - ummm, Laguna? Sorry, can't really think of any right now
3. Most Boring Outfit - FF8 Cid (being the head of the Garden, there was a lot of potential for him to have an interesting outfit, I thought, and a sweater vest...isn't)
4. Most Impractical Outfit - tie between Vaan, Lulu, and Edgar (exposed chest for the first two, and just generally being a really noticeable and regal outfit for the third)
5. Best Formal Outfit - I really liked Rinoa's dress (if only it'd been a little bit longer ). Simple, yet elegant. Ashe's (SPOILER)funeral dress was pretty too.
6. Best Uniform - Turks