Cloud
Ashe
Cecil
Zidane
Tidus
Firion
Squall
Lightning

I noticed upon my last aborted playthrough of FFVIII that Squall isn't really that much of a jerk. You get a decent number of chances to choose his reply and to choose to not be a total dick.

However it is not his rudeness that makes him unlikable. It is the fact he's introverted to a ridiculous extent. Almost all of his "character moments" are him thinking to himself. His reactions to others tends to be superficial and meaningless or just outright dumb. The scene where he flips out in Galbadia - the scene which NO ONE EVER MENTIONS AGAIN - is one of the worst things in any FF ever.

I do give the writers some credit in that they did a mostly okay job of showing the dynamic between him and Seifer. The whole game is essentially them heading down opposite roads of character development. Seifer was always the vastly superior character but he wouldn't be as good without Squall there as his foil.