though what I'd like to see is the option to make the Dragonborn the next Emperor of Tamriel.
'Cause c'mon, it's the Dragonborn we're talking about, most of the known Dragonborns before Skyrim's protagonist have been Emperors, so why shouldn't the one we've been playing as get to be one?
Also, it could work as a good tie-in for a sequel, have the next royal family of Tamriel consist of Skyrim's Dragonborn and his/her descendants, keep their race and gender ambiguous to allow the audience to fill in the blanks (I can see someone wanting to imagine Tamriel being run by a Khajiit Empress, that already sounds awesome). Also, if we'll be fighting the Aldmeri Dominion in the 6th game, It can make for a number of possible reasons for the new emperor to want to go to war with them, such as an Altmer Emperor having a 'My Species Doth Protest Too Much' sort of moment, or a Khajiit Emperor wanting to free his or her people from the Dominion, things like that.