I think you should try out on all classes and see what fits you best. If you like ramboing, getting the most kills, singling out targets and dealing maximum single target damage, the rogue is for you.

Sorcerers and warriors are more of team players. If you like supporting your team with heals, mana regeneration, and being a general AoE W.O.M.D, the sorcerer is for you. If you like the playing style of a warrior, guarding your teammates & taking all the hits, pick that.

Good luck =)