My partner absolutely LOVES prostate stimulation! Apparently it absolutely does make any orgasm feel orders of magnitude better. And if you're uncomfortable about having a dildo up there, you can also stimulate the prostate by massaging the area beneath the balls. :)

Also my best friend, who is gay, says he prefers being the bottom, because the pleasure is better. (But he's happy to be vers and top for his partner, but that's more as a gift to give the pleasure of bottoming to his partner, rather than topping being inherently more pleasurable than bottoming).