I'll take FFVIII because its the only FF I know by heart.

Squall - DRK. He's not noble or anything. He kinda does stuff cause people think he's the best guy for the job and only really gets motivated to do anything by his boner for Rinoa.

Seifer - DRK. 'Hey I'll help you burn the world I have no friends' kinda guy.

Rinoa - BLK. Despite using Angelo, her true nature leans more towards her being [SPOILERS]a godless force of magical destruction.[/SPOILERS]

Zell - PUG. Duh. Zell's the reason why I love that class honestly.

Selphie - AST. Going from her special limit break skills, she fits more of a support role, casting healing and barrier-type magic, plus the wildcard 'wtf how'd you learn to do that??!' spells. Also the randomness of her being able to draw such spells.

Irvine - MCH. Sharpshooter extraordinaire.

Quistis - Er...we don't have a Blue Mage class. She doesn't really fit into any other role besides that. Dominatrix maybe.