Parameters for calling a raise preflop with a low/medium pocket pair

[younggunz]

What do you look for when deciding whether to call a PFR with a pocket pair?
1) Raiser must have a stack at least 10x the size of his raise. (Preferably 20x)
2) Must have position on Raiser (unless there are other callers) Seems like its always -ev to call a PFR with a pocket pair OOP
3) Raiser must be somewhat aggressive and willing to stack off with overpairs. Its pretty hard to find these kind of players nowadays [img]/images/graemlins/frown.gif[/img]
4) Raiser must enter pot from early/mid position. Late position raises are usually just trying to take down the blinds and rarely pay off if you hit a set.

Who calls raises vs guys who are solid TAG regulars? Do you call with the intention of floating/pushing them off the pot on the flop/turn?

I'm sure there are more. I'm really starting to wonder if its a big leak calling a raise with 77 vs a 13/6 guy