I’ve never met any of my music heroes. If I was to talk to Alan Sparhawk from Low I’d probably be equally tonguetied (and he’d be equally awkward).
Meeting someone whose music you kind-of like a bit is even worse. I bumped into Badly Drawn Boy in the queue for the chip van at Green Man a few years back. I couldn’t exactly say “Hi… The Hour Of The Bewilderbeast was pretty good albeit rambling in parts and I haven’t bothered with your more recent releases”. Can’t remember what I said in the end.