IMO the support for StarCraft has been admirable, patches years after it's release, and maybe I(along with my friends) am just lucky, but I have yet to have a single problem with StarCraft.
The Diablo games were sorta fun to me, not StarCraft fun, nor WarCraft fun, but still, much better than the vast majority of games out there.
And besides, the fact that they are as popular as they are should say something.
The first game I played that bore the Blizzard nametag was WarCraft 1, and I loved it, and I've loved every game they've put out so far, and I've loved the support that came with them, if WC3 turns out to suck, I'll be extremely surprised.