I second Necronic on the Borderlands recommendation. It is the only action RPG to hold my attention for more than 10 minutes since the release of D2 way back in the day. It's fun but not quite D2 in terms of replay value. What can compare to D2 when I keep coming back after nearly a decade? One warning about Borderlands, it is a first-person action RPG. It is what "Hellgate London" should have been.
That said, can we go ahead and release the D2 patch already? I would even be happy with an announcement that no patch will be forthcoming and no ladder reset will occur. I started to play D2 again for the 10th time and realized a patch/ladder rest was announced earlier this year. Now what?