Yay!
Up to now, from all the forums I've used, vBulletin is the best and MyBB comes second. Like it is known, MyBB is pretty much a free version of vBulletin with a couple of things less but there are plugins to fill those. The admin panel is also easy to use and it's also easy to back and upgrade as well as install. Design customizations is also easy to do and you don't need too much knowledge to do it and everything is done in the admin panel too.
