Blind Faith was actually the first IPA I ever had - I was probably 18 or so, and I REALLY didn't like it, it was way too bitter. It's amazing what another decade will do though, these days I think it's a pretty awesome summertime beer.
That said, my standby is still the regular Harpoon IPA. I've worked a bunch of their festivals, know a bunch of guys at the brewery (and almost took an accounting position there), and I have to say the guys who make and sell the beer are about as cool as the beer itself.