As much as I think Blizzard is highly overrated, I wouldn't go so far as to compare them with Michael Bay. The man hasn't made a single decent movie. The Island and The Rock were somewhat watchable (with enough alcohol) and that's about the best you can say about that hack. He's the 21st century Hal Needham.
As for Blizzard, they deserve praise for knowing how to cater to the masses and having stable programming, and the production values of their games are very good, but their interface just flat out sucks (talking about Diabacle and the RTScraft games here). Waaaaaay too much clicking and way too stuck in 1995.