For me the only criteria is original programming. I've been weaning myself off of the new customer discounts and am down to HBO and Showtime from having all 4.
I can't tell the difference in movie selection, they all kind of suck, but at least Showtime is usually OAR.
I'm enjoying the Franchise show on Showtime, and they have a few interesting things coming in the fall, and HBO always seems to have something interesting floating around, like reruns of their documentary series, which is always worth a view.
Eve: I thought I was through getting involved with men who were trouble. Falling in love on a look. I can't look at you.
Mickey: You have perfection about you. Your eyes have music. Your heart's the best part of your body. And when you move, every man, woman and child is forced to watch.