This is incredibly minor so I don't expect this to be on anyone's priority list, but I always liked the original green logo better than the yellow one used from 1.23 onward. The TSF banner is also really ugly. I think it'd be cool if there was an option to switch both of these things.

Logo switching is on the list for 7.0. Getting rid of the TSF banner wasn't--I find it useful to know whether I'm running 1.23 or 1.24--but it wouldn't be hard to add an option anyway.