Ken -
How often do you get a bow (one that you're using all the time) rehaired? Do you go by how much playing it sees, or by time?
I don't love new hair either, but after a few long sessions the improvement over the old hair is always nice IMO. But then, I'm a hypocrite - I always tell people to get their bows rehaired and then let mine slide, even though I know better. Doesn't help that I can't find somebody who does rehairs just the way I like and/or has hair I like. Did I mention I'm picky?