I'll agree with everything you've said and caveat my prior claims with the following:
SCs I play very infrequently in any position, but if I play them EP I'll limp. (I'm beginning to sour on SC in general, but that's a different post.)

I figure that if I have TPTK+ I'm good for about 2/3+ pot bet, plus there are still usually 1-2 people acting after the flop before me. So I won't fire away without something solid. The post flop decisions are usually easy, if I'm on a draw to the nuts I'll take a card if it's priced right (or I'll try and price it myself, if possible). If I have TPTK/2 pair I'll bet as if I'm front until someone tells me otherwise. I'll check/fold under all other conditions.