I have been as guilty of this as anyone so now's the time to put that right.
Post here about what you like (love?) about XenForo and let's show Kier and Mike our appreciation and give them our support for all their hard work.
It's easy to sit on the other side of the screen criticising stuff we don't like or don't agree with, without appreciating the time, effort and consideration which has gone into it.
The simple, clean, uncluttered look and feel.
The ajax loading which does away with the need for page refreshes.
The "Likes" system.
Followers/News Feeds - like Twitter but better
Personal Conversations - like PMs but better
Pages - I already have loads of ideas for this feature on my site
All the other little touches which just add up to make XenForo unique