This is hard to narrow down, but, among many others:
Phillips IPA when I'm at home,
Dogfish Head IPA when I'm in the east,
Deuchars IPA when in Scotland,
Four Peaks Kilt Lifter when in Arizona,
Keoki Gold when on Kaua'i,
and if it's Guinness, not too cold please.
So many beers, so little time . . .