in general, 22-99 you play the same, TT-JJ you play the same, QQ-AA you play the same. 22-99, limp preflop, hope for a set. TT/JJ limp in EP, raise in MP or LP, call a raise. QQ-AA, raise or reraise preflop, KK-AA going all-in is fine, QQ don't usually go AI preflop with.

In my opinion, i change that little as the numbers of players decreases.