As someone who's been a fan of Blizzard since the original Warcraft, I have to say they don't excite me as much anymore. I now prefer the presentation of the stories in Bioware games over Blizzard's. Although it's been a while since I played anything in the Diablo line, I don't recall it having a very engrossing storyline. Please, correct me if I'm wrong!
Also, I'm not a fan of World of Warcraft. I've been MMO'd out after all these years. I just want to play an intriguing single player storyline on my time off. Although I have the utmost respect for Blizzard, I currently prefer Bioware's library. I loved Mass Effect's ending sequence. Of course, these opinions are only my own.