[Sheetah]

I tend to always stick to the same pfr of 3x no matter how deep/shallow we are. Good opponent can't put me on a hand (yet) and bad ones will eventually get annoyed and start doing some stupid things (exactly where I want them). Don't forget the math and one of the main poker axioms - in the beginning you're fighting for the blinds => if you hit the gas pedal too hard, at one moment your opponent (typically tightening up at this point) might be correct at folding a lot.

On the other side if villain is not quite observant, calls to much oop then fine, raise more with your stronger hands. Only I see this as an exception, not the rule.

Agree with LJ about putting more pressure when deeper. This I believe is (many times proven) winning formula.