I love low pairs!!!! I play them whenever I get the chance, but as klbjj said earlier, it must be cheap as possible. For me not more then the one x the blinds preflop, unlesscalling a short stack all-in (then maybe). I've made a lot of oney hit a set with low pairs off the flop. You need to learn how to play them, you can really build up your stack, specially early on in a tourney when some fool hits high pair with a Q, K, or A and thinks they have it made