Playing for Set Value

[bluewilde]

I've managed to stay out of a lot of trouble since adopting the "play for set value" approach to mid and low PP. Still, I usually try and stick in a raise with 99+ if I'm in position. Today, however, I was in the first level of an $11 in the CO and everyone limped except 1 fold. I had TT and opted to limp because I doubted a raise would gain me anything. The flop came with an A and a Q, there was action and I ditched out. Is this too passive? At what point do I stop playing mid-low for set value (88, JJ?)

Can there be general rule here or can I switch it up depending on preflop action/position? Can I play for set value (i.e. limp and fold to ANY resistance/missed flop) in early position or around larger unraised pots but play them for pair value in later position against fewer opponents? Thanks for any advice,

Blue