On a slightly more detailed note, I can basically find a use for all characters in FFVIII and it's one of the games were there doesn't seam to be a "sucky" character (I am the same in FFVII - the only reason I don't use Vincent much is because I don't like his Limits, but there's no character in VII that sucks to me either).

So basically I find all characters in VIII usefull to have, which is why it doesn't matter who the 3rd member of my team is, and the 2nd is mostly Rinoa, because I like the idea of her and Squall being on the same team, plus I like her as character.