May 11, 2015 12:10 PM EDT
Destruction: Runes, walls, cloaks (maybe ww cloak)
Illusion: I use only invisibility if My character is that type but nothing else.
Alteration: only the armor spells, I rather use this school for good passives like stability or resistance.
Restoration: I use all of them if I go for it heavily, e.g an undead killer paladin or something like that, othervise just healings and wards.
Conjuration: I use all.
Reason:the ones that I do not use, i find them either completely useless (e.g. Walls and Runes - Or I use them incorrectly, but they do very small damage and are not affected by perks/potions), or i find them boring/game-breakingly powerful like paralyse, fear, calm and fury spells.