diablo 3 is more "direct" when it comes to character progression than its predecessors, thats not neccesarily a bad thing
if you really want it, its fine, game has local coop too on console in case these friends you mention can come to your house or something
if youd prefer a diablo-esque game on pc however, check out torchlight 2
http://store.steampowered.com/app/200710/you can get a 4pack for the same price as one copy of diablo for the console, plus it has a lot of mods
terraria is a cheaper yet still fun decision, and do you like RCT3 that much?