357,
Welcome to the best forum on the net. Hope you can stick around.
You mentioned a Taurus Tracker in Platinum...perhaps you meant Titanium? If this is the case that is the biggest trouble with Taurus in my opinion after owning a 357 Ti for a while and then dumping it to find another. Well I never did find another Ti Tracker that was up to my specs so I gave up on the quest. In fact I sold my other two Taurus products and concentrate mainly on the Smith & Wesson products now.
The porting will not blow gas in your face unless you are perhaps struggling with someone and your face is over the porting. It will, however cause temporary blindness due to the fireworks if shot at night.
If self defense and a revolver are what you want, I believe that the .357 Mag is a great choice. You can shoot all the 38 specials you want in it, this will save you $ over the mag rounds and make it easy to develope skills with your new gun.
The Smith model 686 is a very good gun, it is a L frame and will shoot any ammo you feed it. The gun that I prefer for self defense is the M19 in blue or the M66 in Stainless.
The M19/M66 is a great way to go and will feature adjustable target sights. These guns are available in various lengths including 4 inch. I am in the process of changing the wife's bedroom gun from a M15, 4 inch 38special to a M19, 2-1/2 inch in .357 with crimson trace laser grips. This and a good flashlight are great for the night stand for a man or a woman.
The 66 is a great gun and was used by many police agencies. I have one stamped Indiana State Police, and it is a great shooter gun.
Just a word of warning...you said that Smith's were not the sexiest gun at the range. This could be considered fighting words by many.
Good luck with you decision, you know my vote is S/W.
Fred