The story is really really fucking awful. Just want to get that out there. Reaper of Souls has decent bump in writing quality but its still lol tier even as far as fantasy writing goes. You just don't feel as bad for the voice actors as you will while playing vanilla D3. D3 still has the best actual "feel" combat wise in an ARPG though. Not even the best clones come close.
I typed that out and realize you probably won't be getting RoS but still.
I'm only in it for the loot m8, couldnt give a fuck about vidyagame stories. I'm not an ARPG guy but i really liked Titan Quest, and had some fun with Path of Exile with PD and some other ppl.