Half because I am curious and half because I want to pick a class I can just goof around on and not worry too much about stuff. But yeah, so far, Wizard is pretty good to me, but I am curious about some others.
I used to play Warlock for years and loved it to death. Poking around on live recently again and it's still a fun AoE class, although I'm pretty lost and have no clue where they stand in the scheme of things anymore.
Shadow Knight is the best caster class around. We can DPS and tank well so best caster class to goof around.
I would say, "any class that can get its spells off QUICKLY if you're going to solo," which means I'm usually doomed to disappointment when playing any of the "real" Priest classes (Templar/Inquisitor/Channeler [that last, I'm still struggling with; not sure how to even change my pet's appearance]). The spells take forever, even with AA selections for speeding them up, and the "Plate" armor on the first two resembles used facial tissue (you're welcome, Kleenex(R)! ). Seriously. Thank goodness for the pet on the third, since the class combines the extremely sllooowwww casting with leather armor. :-/ Uwk who loves, loves, loves Druids for solo work in the Priest line, and most/all of the Mages... ;->
Guys don't play games with him. We all know the Swashbuckler is the best caster class because he is cool while doing his thing.