My favorite part is the ability to delegate some of the payout rewards of a post to other users, friends for example like you said.
My one big and yet unrelated question would be more about whether or not there is or could be a web designing backend application for the STEEM blockchain that could be like WordPress or other web builders in letting us customize at least one home page which we would use to link to our Steemit posts and to Dlive and Dtube Dsound videos, audio, other things, and/or whatever we want for a home page. MySpace had a feature which allowed people to customize the home page. My question is about if there is any projects out there yet like that for Steem or if others are interested or not in a customizable home page thing.