Has anyone else only been to ONE concert?

I've been a long time fan but sadly I've only been to one concert -- it was in Toronto (Maple Leaf Gardens) during the Fragility tour with A Perfect Circle as the opening band. I think the ticket cost around $57 for a nosebleed seat.

EDIT: I got the price wrong, the NIN ticket was $35.75, it was the Radiohead concert that cost $56.