Padraig--I agree that fast greens can be bumpy, terrible combination. But overall, I like semi-fast greens better than slower greens. When I am putting on slower greens, I sometimes feel like I will have to hit the ball so hard it will get airborne in order to get it to the hole. That is not enjoyable to me. However, on the other side, greens rolling 13 are not fun either, because I do not play them every day, though I don't think greens that fast would be more fun if I did play them every day.