I enjoy x10 the most, its the most balanced of them all.
Scout = Scattergun, C.A.P.P.E.R, Batsaber (I don't play scout on x10)
Soldier = Liberty Launcher, Concheror, Frying Pan
Pyro = Flamethrower, Flare gun, Powerjack/Volcano fragment
Demoman = Booties, Splendid Screen (duh), The...