Restoration, because I'd feel guilty picking anything else.
On that note, it's just occurred to me that restoration focused characters are always presented as self-sacrificing goodies. The evil potential of restoration is definatinately going untapped.
What's that necromancer? You get to live forever as a lich? Oh, well I've just cured ageing.. let me know how that lich thing works out.
What's that noble hero, you've just found out you've got terminal cancer? Oh, that's terrible, but I can certainly help you out. Step into my office, we're just going to need to go over a few conditions first..
..and failing all that, I just invented magical surgery. I think it's time for your heart transplant!