Personally, I think keeper leagues suck. If a guy gets a stud like Arian Foster, it's just too much of an advantage to have him every year.
I got Arian Foster before the 2010 season in the 7th round of a 12 team league.
I won the title that year and 2nd place last year. Currently in 1st place through 4 weeks with a team averaging 122.5 PPG.
I even got RG3 in the 6th this year. I have a feeling the other people in this league are going to petition for us to change the keeper status, but we all agreed it would be 2 years after we vote to stop it being keeper.