If you want to see some bad acting, I'd like to refer you to Nick Cage in Firebirds. Or, well, pretty much anything up to Con Air, he actually didn't suck in that one (well, not badly anyway).
If you want to see good acting, see Anthony Hopkins in Silence of the Lambs.
A good actor can make a mediocre movie an make it OK, and a poor movie at least watchable. James Woods is (as is a few other actors/actresses) like that, there's been few movies that he couldn't salvage.
My problem with Michael Bay movies is the need for double hearing protecting and the extreme overuse of lens flare. I figured the NAVY damaged my hearing enough with the jet noise (the sound of freedom. baby!), and I understand lens flare to heighten a dramatic shot, but not every shot needs it.