With low pairs ( 2 ~ 9 ) i only limp in any position, and call 6BB at late postion (CO or BUTTON) , with high pairs (T ~ A), i open a mini raise with any position if no raises before me, if anyone raises, i call 10BB at late position, if i'm on late position and someone 3bet me and i'm on with KK or AA, i do 4bet, bcs mostly of times if u open raise, and people got Ax suited or AJ,AQ, certanly then will raises ur raise, bcs other hands people already raised before XD, so good lucky and hit ur three of a kind soon as possible, if u did hit nothing, and have many action on pot just fold, and dont lose more chips