I find that the current "MA" logo for magento.stackexchange is difficult to recognize, and to differentiate from other stackexchange "letters logos". (For example when I look at the list of "Hot Network Questions")
I searched a little on the meta, and only found one thread about it, from February 2013 !
I think it could be a good thing to have a personalized appearance, to feel more "at home". But is it possible ? And what is your position about that ?