I use vBulletin when ever I can afford the license. I currently use it on my Gamers fan site i built from ground up and skinned.

It's funny because when NukeMods used to use phpnuke I would stop here and always think when will they use vBulletin. I always knew either NukeMods or NukeCops would do the switch.

Me personally it's the best move that has been done.