One time or another I have carried them all, 36 49 M10 2 inch. However the Centennial frame, lightest you can get gets carried more than anything else. One I carry now is a 342 it's as near to perfect as you will find.
Our club runs Back up gun matches couple of times a year, get to see all sorts of small guns shoot 50 rounds or so in competition. S&W Snubs are by far the most reliable & dependable.
642 or 442 are only about 15 oz. very easy to carry. Hammerless won't snag on the draw. I took "boot grips" off and replaced
with Umcle Mike"s full size J round combat stocks. Ruger's LCR is also worth a look
for comparison at 13.5 oz. Taurus 85UL or
Charter Undercover are 17-17 Oz. and can be had with concealed hammer. Any of them will do the job, but I grab the 642 more
often than the others.
I have only one revolver suitable for pocket carry, a Model 38. Over many years it has been carried in my pocket and it looks pretty bad. Considering all the other stuff that gets stuffed into my pockets, it could look worse. Pretty handy little gun to tote around when nothing else will do.