I am a life student, I kind of lost intrest in the Game since lvl 45 ... ok you get stronger, ok you defeat new more powerful opponents, but where is the reward for getting to a new lvl, there are no more spells to learn from your school (I know you can take a side school) ... also the fact that by each lvl you get very little progress (if it's not for what you wear you are week) ... And I love this game, I truely do, infact I will try another school soon ...
There's a spell at level 48 and another at level 58. Also, there's much better equipment at level 50 and higher. In Celestia, you have access to three more schools of Magic.
Nothing wrong with trying new schools. Most people who've played this game a long time have more than one high level wizard.