Hello. I prefer the spurless hammer if the gun is to be carried concealed although I must admit that I have never seen a revolver with a hammer spur hang up coming out of an OWB holster from under a shirt or jacket. I have not seen it from an IWB holster, either. I definitely have seen hangups with a snub coming from a pocket holster and I will not carry via a pocket holster unless the J-frame snub is spurless, ie, bobbed hammer, or BodyGuard or Centennial. I am aware of the thumb-on-the-hammer method of preventing hanging up but I just prefer to get a proper grip and come out with it, which "spurless" allows. Others may feel differently and I respect their choice but such just is not my preference so I don't do it on pocket-carry snubs...but I'm wandering again...
In my early years as a police officer I was fortunate to be taught DA-revolver shooting by some PPC shooters capable of competing at the national level and who had several times. Over the years under their guidance and training, I practically never used single-action, though I left the spur on my service revolver so that it could be secured in my uniform duty rig via strap or the then-new thumbreaks. When I was in plainclothes, I learned the hard way that spurs and square butts on revolvers eventually wore holes in the lining of my sport jackets. I went to a round butt revolver with a bobbed hammer spur and holsters that secured the revolver via really nice fitting. You could easily pass the old IPSC "test" to see if they held the gun securely, ie: somersault with holstered gun and it remaining secure. I noticed that with the bobbed hammers, if I went for the revolver quickly and managed a grip that was a little too high, I could still fire the gun; my hand didn't retard the hammer's rearward motion as it did with the spur intact.
Quite a few of my larger revolvers as well as K-frames have their original spur hammers and I feel no real need to bob their hammers; they do what I expect as they are.
Even my bobbed-hammer K-frames have their original hammers packaged and labeled which goes with which gun so that they can be replaced quickly should that need ever present itself, though I doubt that it will. All of the bobbed hammers were fitted to specific revolvers.
I guess I just like 'em that way because I'm just so used to them. Others will disagree and valid points can be made for their preferences in not trimming the hammer spur.
I'm used to it and it just works for me. I think it offers a bit of a anti-snag safeguard but maybe that's more theoretical than likely. Who can say? I just prefer it.
Best to you and yours.