I wrote this when he was tempbanned and it's still basically what I think:
To answer the question, though: HP but I oddly still miss him. His opinion was very consistently just the mainstream liberal position on every issue, always stated very coherently and usually defended intelligently. (And it was always true that where it was defended unintelligently, this was always because of blind spots in mainstream liberalism as a whole.) Virtually every thread expects his opinions to be cited in it, and without someone voicing those there often isn't a good poster to reply to or contrast with.