I think that you are in more of a limit mentality. In NL, playing 75 offsuit in the SB just because there are 3 limpers is not a good idea. Lots of people do it, but I dont like it at all.
Youre out of position for the whole hand, and if the flop is somethign like K73 or Q95, youre not going to get correct odds to chase a 5 outer like you would in limit. Someone is going to bet the pot ( not just one bet which might give you good odds in a limit game.)
![The Ace of Spades [As]](https://www.pofex.com/images/smilies/As.gif)