What Blizzard creates aren't games, they're as sterile as you can get, it's more of something along the lines of 'Public Entertainment Software.'
I can't really say much about Blizzard. My last three pruchases were SC 2, Diablo 2 and Starcraft 1. So I'm not "up to date". But with Starcraft 2 they did a solid and entertaining RTS. I only played the single player, but that was great. Considering Blizzard could have just made a pure MP game they would still have become filthy rich. They certainly put more effort in the SP campaign than they had to.
And CDP, well, there was this one think which put them on my blacklist. But I'm not derailing another
thread with this today... ;-)
Edit: Fsck them for not releasing Lord of the Clans, though!