Really? I actually feel the opposite, I really enjoy a lot of the pokemon post gen 5. There are of course a lot I really dislike, but some I really, really love. Not a fan of most gen 1 designs(they just feel a little basic to me, with exceptions of course) but I certainly would be sad if I had to restrict myself to the first 5 gens(even though that's literally what I did with Captain Blueman over here, with one exception.)