The Millennium Forums is the main forum I use. I've been on there for 4 years. It's a place for everything and anything, with some pretty unique and hilarious members. I just became part of the staff, and they made a new position for me called "Section Manager" with my own cute pink username because all I mostly do is host Assassin Games in the AG subsection here: http://www.millenniumforums.com/forumdisplay.php?157-Assassin-Games
The mods are very chill and members can be very unrestrained. If you're looking for a place to cut loose, TMF is it.
If you decide to make an account, please tell me your UN as I will probably need to personally ask an Admin to verify your account. We had a problem with dupes, so the Admins decided to close Registration.
If you don't like the default skin, don't worry. The site has 17 beautiful skins to choose from. I personally use the lovely Primus Doflamingo skin because it is pink :
If you join, you will see the very active chat box where members chat daily and even have little games sometimes. And you'll also get to see the infamous Excrement Zone (our poorly named spam section) which has some of the most hilarious and interesting threads on the internet.