It's funny you say that you feel guilty, I think quite the opposite. With all six, I give attention to all at certain times (getting up and about in the morning), and let them choose who seems most in need of attention. I think they split up my time rather evenly. I don't take them places. We did all go to my mother's for Thanksgiving as all my family requested their presence. It was an awful lot of work, even with the help of my two teenage boys. I was thinking of taking only three (because I have three young nieces), but it seemed so mean to choose. We all had fun and everyone got home safe and happy.
