Castle and upgrades question

I don't think it's worth upgrading the barbarian castle past 20, as all you get are walls... Which are much cheaper if you just buy them. :) With the other two, if you keep going past 20, you get walls you'd otherwise buy for cla...er, wrong game...donuts. ;)

As far as leveling Homer and the rest of the family past 10, that only brings bragging rights, so says the game itself. It tells you that your neighbors will be able to see what level you got to somehow, but if they've told you how, I've missed it so far.