Diablo II by far for me.
I was hooked for 4 years and would call out of work so I wouldn't miss my chance on snagging a Ethereal Death Cleaver from the Blizzard Message boards to finish off my Zealot.
iPhone = Great gaming device. Don't agree? Who cares, because you're wrong.
Currently playing:
Final Fantasy VI (iOS), Final Fantasy: Record Keeper (iOS) & Dragon Quest V (iOS)