I expect X is my fave band among those listed, although it's not really a punk band -- more like power pop. The conventional history says Sex Pistols in London, Ramones in NYC and X in LA were the official avatars of punk, but they're three dissimilar bands altogether, and X was always closer to Nick Lowe & Rockpile than to Johnny Rotten.

X is the band I've seen play most often. Saw them twice in Boston and  twice in CA. If I recall, it was once with Billy Zoom, once with Dave Alvin, and twice with Gylkysson on guitar. In a biker bar in a nasty section of San Jose I saw them play in 1987, with Bad Brains as the opening act.  That was some show (it was the Billy Zoom one).
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