I mainly Monk and Warrior in gvg, and being very different proffesions I prefer very different interface setups for the both of them.
Id like to be able to save different interfaces much like you would builds and armor setups. There was also a thread about saving all four weapon slots rather than just one when you save an armor template, which could be included here.
Its one of those "would be nice, but Anet probably doesn't have the time" things, or it'll just get shot down by riversiders or people who dont have a need for different/customized interfaces, either way, I just thought id throw it out there.
