It's great to see the classic old model 36 hanging in there. It was my pick and when I voted I didn't really expect the exposed hammer, carbon steel gun to be doing so well. A pleasant suprise.
Model 640 38 Special. Purchased in 1992 as a back up/off duty gun as young policemen with CPD. Loaded with the 158 grain + P Lead HP (old FBI load). This gun has seen combat and saved my a@" in an off duty shooting that took place in 1995. It's still my deep cover choice in a some respects even though I've left the revolver platform years ago.
It does appear if you add in all the models that are "Centennial" in this poll, plus add those Centennials not in the poll, that atleast half of all J frame aficionados prefer the "hammerless" model.