i hardly use any potions at all, benefits of being able to cast all sorts of spells.
My problem in forts and stuff is that i can't take all the loot with me, i have to go back once or twice if i want everything turned into money. And finding a complete set of daedric armour didn't make things easier, because naturally i started wearing it myself, which means i get encumbered even faster. I really need to level up in heavy armour, so the weight won't bother me that much anymore.