Up to fronts are pretty kind to forks relatively though I guess, it's botched hooks that destroy them.
As for how often my bike breaks, I found a crack in my 4 year old cranks about a month ago, and I've had a couple of punctures in the last few years, and changed a set of grips, but that's it. As Ali says (and I've said before), selecting the right parts for your riding really helps.