I know there are a bunch of people out there with their own sites and I was wondering how many of you use forum software, and if you do, which do you like/use?

I am currently using YaBBSE and testing out SimpleMachines Forum (SMF). I must say that YaBBSE is good had an easy way to change the look of the forum but SMF went with a far more complicated way to change the look and feel of the forum, but I do understand that it is FAR MORE powerful too (as far as skinning goes).