How does Facebook choose the friends that show up on your profile when you look at it?

[M]

I feel like it's a mix of the people whose profiles you view most and the people who view your profile most. If that's true, it's an awfully sneaky way of making people keep coming back to Facebook (among others... sometimes I feel like Facebook is just a big social experiment).
"Facebook can't hit at who views you most"..... that's simply not true. They may not be supposed to, and I know their FAQ says that they base it on who you interact publicly with, but that's simply not true... Some of the people who show up are people who I have NEVER interacted publicly with OR viewed their profile in months but that I happen to know sort of stalk me.... Sooo the only logical explanation is that it's at least partly based on who views your profile most.