I'm interested in playing the house lord. If you're interested in character ideas to help build a framework for campaign ideas, how about something along these lines:
Our house was on the brink of becoming a greater house, and was securing its place by marrying one of the lord's son's to the daughter of an unaffiliated great house. But indstead of marriage an incident similar to the red wedding occurred and in one fell swoop most of our house was slaughtered. And whle my character was the designated heir, he was too young to assume control. Instead, in an unusual move, the house to which ours was pledged sent someone to 'help manage our affairs' until my character attained his majority. This stewart then went about trying to force our house into greater and greater dependence on our sworn great house. As my character's majority nears, he survives a poisoning attempt. In responce he sends men to stir up rumors of a company of brigands pillaging in the north. After the initial scouts sent to investigate fail to return, he prevails upon the steward to investigate it personally. With the steward temporarily gone, he takes his ancestral seat and must scramble for support before the house's 'benefactor' returns. The other PCs, having known my character as a child or otherwise having independence of spirit, probably don't treat him with the deference usually given to a house lord, but they may be the only ones he can trust.
As far as level goes, I generally find high a bit more interesting than low.