Meh. I know that Diablo isnt know for especially complicated magic systems. And no, I wont ever touch any Diablo again. They're flat out boring. Among other reasons because you dont get many abilities. Also not much story. Also extremely boring gameplay. Also extremely annoying having to check the loot and having to decide what loot to take and having limited inventory space.
Diablo is the action roleplaying version of Tetris. Like the later, its extremely successful, and I have no clue why.