dude i have had 48 hour straight binge sessions of D1, in college with my dorm mates using the OG coax bnc nic cards running coax from one room to the other.
I also remember pissing off our RA, until we got him into our sessions, which then we magically made the cables disappear putting a rug over them.
D1 was epic.
D2 was also very good with the first intigration of Battle.net
D3 i think was a massive can of fail with the real money shop.
Diablo Imortal - *sigh really mobile only for a PC game!?!* (insert picard face palm meme here)
D4 i am not so looking forward to it, because i feel it will be heavily censored.