Quote Originally Posted by Robb
I suck at SnG's, so I may be full of bs here. But my view on a big chip stack is that you have to use it - well. Playing too loose allows opponents to wait for great hands and double through or win a big pot, thus allowing them back into the game. Playing too tight, you blind off all your monies. There is some happy medium, playing good solid ABC poker, opening a bit (especially in position), and taking a few small chances. You don't have to play very loose (maybe 15-20% or so VP$P) to stay even with the blinds if you don't go card dead, so there's no reason to start playing 40% of your hands.
Depends on your stack, opponents' stacks, how many left in the game etc. In some instances, you can be raising 80% - 90% of your hands and be uncontested.

If no one is comparable in chips then 50% is quite easily achievable. Defacto, even.