POE
Cons: Slow leveling. Too many **** items. No fiat currency (stupid item currency system). Bag is way too tiny (and not option to make it larger), building a good character takes ages, and screwing up your passive tree can kill your character. No GOOD trade option (off-game forums, in-game trade chat that is spammed on a 24 hour basis). Micro-transaction items are useless (stash tabs are the only useful item, and there are ways around buying those...). DESYNC. No controller support. No offline play.
Oh, and the story sucks...horribly.
Pros: Chat is funny. Massive passive tree. Flasks automatically re-fill with kills. Witch doesn't suck balls.
---
D3
Cons: Easy as hell to die depending on your class when on higher difficulties...you can only
Tumble so often, after all. Removed the marketplace. No offline play on PC, has it on console, and claims they won't add it for basically "**** you that's why" reasons...-10 points. Diablo is WAAAAAAAAAY too easy to kill, while the monsters outside his chambers slaughter you. Nothing to use money on...like, AT ALL.
Pros: Ruby + Helmet + +% exp items = Easy leveling. Not much needs to be purchased. 2.0 = easy magic drops to go straight to the furnace. Demon Hunter SMEXY HEELS.