According to Emmett, the aggregate Stack Exchange Profile you get on stackexchange.com is based on your eldest account, which is most often one's Stack Overflow account.
While we've managed to confirm that, it still hasn't changed the fact that my profile is dull, accurate, and monochromatic green. It should be either cheery and colourful, or horribly inaccurate towards anything that identifies me.
I'd like to request that, in the same vein we can specify which account our chat profile inherits from, that we be allowed to select the profile for our main stackexchange.com profile to draw from.