Wow. Level 12 is when I fell in love with my wizard all over again. Levels 1-8 were a pain (I also did not enjoy the fact that I splashed 1 level of rogue and I hated level 1 as a rogue)... going in quests with zerging people before Wall of Fire was rage inducing... but level 12? Wraith = I love wraith. I love gear a wizard, so much less to worry about. I love my aura. Then FoD kicked in and... MORE love...
My sorcerer was fun from day one, though. But now with instadeath spells they're both just as fun (both level 14).