Honestly, this is tough call. I picked Spellcasters not because of the way the game handles magic (which is frankly horrible and which someone brilliantly described as "built in cheat codes) or even because of the world (which is blatant Harry Potter rip off) but because my favorite sims are spellcasters.
Being a Vampire or Werewolf defines a lot about the way you play the game, but I can play a spellcaster and sometimes legitimately forget my sim has magic. All of that is good and bad for lots of reasons.
In the end, I like spellcasters because I like the idea of what they ought to be rather than what they are.
