in terms of look and format of the boards, i'd say don't fix what isn't broken
fine to improve, but don't lose this structure for that previously mentioned 'flat' kind of format because it will ruin what is unique to these boards
you can't get this sort of interaction anywhere else

the boards are set up fine to me and alot of other people
in terms of colours i like them. kind of classic and easy on the eyes
when you're on here for an hour or two its good that they don't distract from the reading n stuff. conducive to long sitting hours hehe

that's my 2 cents on that though

i think you'll find majority of people happy with the structure of the boards and it will be a big problem if its changed.