I've been using 28h rims for more than a decade and never broke a spoke. For my most recent set of wheels I moved to 24h just because. My weight varies between 170 and 200 depending on season (yeah I know, that's bad), but regardless, I'm of the opinion that 32h is not needed these days for guys that ride the road and don't beat the crap out of their stuff. Oh and it's not just about weight, less spokes means less aero drag and that can be noticeable. I've got a cheap set of performance wheels with low spoke count and they roll noticeably faster than my 28h'ers when blasting down hills at 35+mph.