[shark6]

I'd check/raise the flop for information aginast TAG's. A TAG isn't likely to 3-bet you with just overcards.

Against an unknown, I'd probably do the same.

Resason being, if someone raises at all PF, it's more likely they have unpaired overcards than high pocket pairs. I think the check/raise approach loses the least when your behind and gains the most when ahead because they'll call your check/raise and turn bet with just overcards.