this is an interesting question and one that I can't completely answer yet.
I interviewed at 8 programs.
my top 2 i feel really great about and would be absolutely thrilled to go to either one.
the next 2 I feel good about it and would be really happy to go there.
the next 2 I'm ambivalent about, I guess I'll rank them, but I'd be kind of disappointed if I wound up there.
the next 2, I think I'd be pretty unhappy if I wound up at either of these, for different reasons. I can't decide if it's worth the risk to not rank these two.
I'm really curious to see how everyone else is deciding about their rank lists.