vBulletin FTW!
What I lvoe about vBulletin is the ease of setup and the fact that if I copy/pate content from the web it pastes it in the thread with all the images/links thanks to the WSIWYG editor
I will never even think about switching.
I have to admit though that vB3 is much snappier I wish there was a simple way to convert the databse to work with vb3 but it's a big hassle to downgrade