It would be nice to have a section in our profiles for achievements or something similar. I won a tournament recently, and I thought it would be nice to have a trophy section where this is recorded with some information about the event. Maybe it would appear with something like "Gold - Warzone Tournament 1234", and we could have access to the date, average rating, and similar things.
Also it would be easy to come up with any number of achievements to award as many video games have now. Winning streaks, beating someone high above your rating, playing a number of consecutive days, etc. These can be a bit silly but they are fun to collect.