I haven't a clue how heavy my bike is, and furthermore, I don't really care, as I am non competitive, but weight I believe promotes fitness. If one has a heavy bike and wants to ride it, one is just going to have to do so weight regardless, get fitter is the only option and true key to it all, the fitter one is, the more one can enjoy their bike.
Yes, I do lighten my bikes, by swapping out steel for aluminium, but that is more to do with the other properties of the metal rather than the weight, aluminium bars for example provide damping for the front end in lieu of a soft stem or suspension fork.
My riding style is to pick a route as it is presented, not bludgeon the bike over whatever comes at it, and slam on the anchors when the bike can't cope.