Interest / Topic Map on Profile

I think it would be interesting to have some kind of a chart showing the areas where users are active. Like where do you bookmark articles, blogs, wikis, where do you post, where do you join discussions ask questions etc.
There could also be different views to that, one view by topic (Solution Manager / ERP / Hana / ABAP ...) Another view by activities (Blogs / Wiki / Discussion , maybe differentiating follow / create).

This would create an interesting view to each member and you could tell if it is someone simila to you or just having few areas in common.