I felt the same way. I was excited for SWTOR and D3 and felt underwhelmed by both. First off SWTOR had major problems on my system and was poorly coded (I know because it's one of those games that just maxes out my core i5 3.0 ghz processor on low settings). So I quit that under a month.
It's kind of sad that my two most anticipated PC games for years on end were SWTOR and Diablo 3 and I don't really care for either.
D3 was okay at best but the endgame is getting boring. I mean the only reason I am still considering playing it is to make a few dollars on the RMAH. I know my chances are slim and well I don't think it's even worth it to bother. I am better off using my PC for other things.