What satrek said, i hated it when i had forked lightning assigned to I, and i'd cast it and then go "WTF NO I WANTED IT TO GO THE OTHER WAY, NOT UP! STUPID STUPID CONFIG!". Also, yeah, assigning one key to two items would be nice (its an old suggestion, and people didn't like it because they were like "well you can just have an entire 'suit' of items on one key, and it wouldn't be fun anymore" but i like the idea of just two items...).
I also like the idea of hitting a button once for one spell, twice for another, and thrice for another. It would be rather nice with things like, for example, bullet spells.
Once for magic bullet, twice for large bullet, thrice for bullet swarm
