It has actually been 2 years since I played AC:Brotherhood. I have already played and platinumed AC:Revelations and AC:3 since. I looked at the forums for Brotherhood and saw that there was now a method for boosting to level 50 in Brotherhood. Otherwise I would not bother going back. I like to try platinum everything I play, so I decided to go for it to be able to have all the platinums for the series.
Thanks for the compliment, but there are quite a few players with higher percentages than me. If I were not so cheap and could bring myself to pay the ridiculous prices for DLC, mine might be a bit higher.