Bought a six pack of Anchor Steam earlier today, having one now. Oddly, I'd managed never to try them before despite having eyed them while buying beer on a fairly regular basis.
It's really quite excellent. Malty, clean, with bitter hops creeping in on the finish. You get a really nice velvety foam form in your mouth when you take a sip, like a good porter or stout.
I will be buying this again.