jackalKnight: I don't agree with Diablo 2, mainly because I consider the Torchlight series the "true" heirs to Diablo, but that's just IMO
As do I. I did eventually get around to playing D3 on a friend's account without the server dropping (something which took over ten attempts and several weeks) and I was massively overwhelmed by the blandness of it all. To be honest, while I hate DRM with a passion, I might have put up with it if it were a mindblowing experience. Instead, D3 is a cash-grabbing, soulless, mundane experience.
Torchlight and Torchlight 2 went some way to re-capturing what made Diablo 2 great, and yes, Titan Quest was great too. I don't recall there being many bad Diablo clones, to be honest.