There are actually certain dices that divide unevenly and stuff, Also I forget who, but a group of my friends all diced each other 1000 times, and they found that If you dice and win, you have a better chance of winning the next one, Now Im not sure how accurate this is, but considering that it worked a ton and they diced something like 7000 times there might be something to be said that the dice plugin isnt totally random, If you knew this than you could be "good" at dicing like burritoh said.