I am using GT Plus and have the Went to SD stats and Won at SD stats. Depending on how legit the guy chasing me seems at the low limits I am playing (1/2 and 2/4) I might chk it to draw the bluff. If he is a yahoo then I am going to fire and stay till the end.
Also if I am leading into multiple players I might still check it. I really try hard to see who is behind and what might they have. I might be losing a little value here though in traffic often someone will take a stab sticking me on some kind of busted draw. I think I am a sissy in my river play but then I have won so many showdowns against bluffers and saved a bet on a slow played monster to feel I am doing okay.
I think my theory can be best summed up this way:
On the flop and turn I might bet hard to show I have the biggest balls (if not the best hand). On the river I want to bet when I feel I have the biggest dick since when you showdown with a beautiful woman (or man/animal/household object) you really want the biggest dick.
Rich