I've never, ever showcased any forums on any platform - started out using phpNuke and phpbb in my teens before spending a decade or so ago onto vBulletin - so bare with me if I waffle on here!
Anyway, I've been a member of xenforo for a wee while now, started off on an associated license that @Kevin let me use so I could play around with the software then I finally bought my own license late last year.
I've created my "playground"; I call it that because it is a place where I can muck around and learn stuff whilst having a small community. I don't create websites looking for a mass influx of members...I know 95% of the people on my site (we only have 28 members so far) and its a place where they can chat, discuss topics, play arcade games, post images/videos etc in a relaxed environment - I don't really care about popularity, number of members or posts etc.
My site is based around UI.X framework by @Mike Creuzer and the "most prominent" addons are TV Thread Starter and Movie Thread Starter addons by @Snog and Featured Threads/Portal by @Brogan. I'm also running both galleries, one for images and one for videos and a host of excellent addons by @Bob - I've changed his Showcase addon into a Recipe Book (I'll be working on that soon) and I've also got AD Credits running.
The final piece of the jigsaw is the arcade, I've run arcade systems on nearly every site I've built and although this one is quite limited in features I've managed to get it looking "fairly" decent and my members love spending free time playing some games.
I'm sure people will pick up on errors or tell me things don't look right but as I said it's my playground, my place to learn things and also have some banter with friends - nothing more than that.
I'm quite happy with how my site looks, feel free to have a look around - http://www.generalchatter.co.uk
One final thank you to @Sheldon who has helped me with a few css issues that I couldn't work out myself, if you're not already a member check out http://www.xfuniverse.com - there's a ton of tutorials and advice available.