I totally agree, I am one of them :D
It's got thousands of bugs, slow and is pretty much unusable, whereas XF is fast, modern, user friendly, clean, easy and simple :)
Hey, I just created a ticket at vb.com about selling my license, but apparently someone has been using my license without anyone noticing, so I was told it could take weeks or months and in the worse case not at all to have the other sites shut down and that I can't sell the license until it is...
I have been with vBulletin for a long time, then moved to XenForo, then back to vBulletin. But from seeing this and how efficient and organised it all is here, vBulletin has no chance! :p XenForo forever!
I have VPS hosting I never had shared.
P.S Your site has a spelling error in the rules page.
Thought I would let you know. ;)
If it is meant to be like this then sorry.