Best RPG, probably role playing game is mean in this
Lot of alternatives to the name, like
TopRPG, GoodRPG, YourRPG, MYRPG, GoRPG, PlayRPG, etc, etc,,,
.co.uk limit the value is it limits to specific geo location in comparison with .com, for example
I would prefer plural, that would be ideal for site with best rp games.
All in all, I do not really feel value in this name - meaning that you can hold name for several names imo, and once the sale is there, the selling price will be less the total cost of acquisition and renewals.