Conjuration for me. I like having a large variety of summons at my disposal. Destruction is a close second though.
Favorite either enchant or illusion. I vote enchant because it had no votes (you jerks). Am I the only who uses restoration the least out of all the schools? I was always more of a alchemy kind of guy, health potions were always way more effective to me.
Yeah, I never used Restoration much, apart from absorb health. I'd rather save my magicka for offensive uses, and stick to potions for healing.