As a non-white punter, I do find it mildly annoying when one of the rare few I find attractive says they will only see white guys, but I can be philosophical about it. There shouldn't be any compulsion in this hobby, and the last thing I want to be involved in is a situation where someone doesn't actually find me attractive at all, but is just doing it for the money.
Besides, I have a whole long list of criteria of my own in what I find attractive, so I can hardly talk.