lists are useless imo, they are just like contact lists in skype or aim chat. And to make them there is no reward after. Lists would be useful to organize people and give different rules to have posts leak into main feed. for example posts with at least 2 retweets and/or 2 likes. if they'd make something like that, that would be awesome.

For now I just don't bother I scan fast enought to find interesting bits for me.

my 2c.