I'm so surprised RoyalBlue (Ash) hasn't popped into this thread yet! LOL!
It is such a personal thing. I can't stand carpet and we won't be having any in our new place (aside from some removable 'rugs' possibly) We will actually be having Karndean Vinyl Planks (and tiles in wet areas) For every person I know who would agree with my choice of no carpet there would probably be just as many who like carpet....... so although I would be personally drawn to wooden floors in the bedroom I don't think it would necessarily 'increase the value' (because its not to everyone's taste) As another poster mentioned- the money that would otherwise be spent on timber flooring could be used elsewhere in the house if required (if your aim is to increase the value)