A Profile page which users could design as they like.
There was a lovely feature like this on an old vb going back to 3.6 I think but it got dropped later.
1. You could move the blocks of your profile page around. As it is now there's a lot of good info hidden behind tabs. I hate that. I have a custom template that drags the Information stuff out front, and adds fields to the sidebar. But there should be more member choice.
2. You could add optional blocks. eg a selection of pics.
3. You could change the colours. There was an amazing small diagram thing that looked like the page. You clicked an area, got a popup colour picker, selected it, and it changed. If you liked it, you Confirmed.
There was a lot of debate about how a lot of these amateur designs looked awful! It was clear if the site was about design, or needed to be impressive in a businesslike way, this feature did not suit.
But for a strongly community based site it was wonderful. Members LOVED designing their own profiles. They also helped each other a lot generating personal links and discussion.
It made visiting someone's profile page a really individual experience.
Also of course it can be a reward for good members.