Nothing against the 10mm, but I prefer the .357 Mag. Mostly, because it is a revolver round.
I am a reloader. Being a revolver round I have more leeway with bullet shape as feeding through a box magazine up feed ramps isn't an issue. Being a revolver I have more leeway with how hot (or, more usefully how mild) I can load it as I don't have to keep it in a relatively narrow power band in order to assure proper action cycling. Being a .357 Mag I can also shoot .38 Spl out of it if I so desire (and I do, a lot), keeping in mind that I have to scrub the chambers to get rid of the gunk rings.
Now, if it were possible for a pistol chambered in 10mm to use .40 S&W then some of those issues would just go away. But it isn't possible, mostly because you'd have to swap out main springs (because the rounds are weaker), barrels (because the rounds headspaces on the case mouth) and modify the magazines (because the rounds are shorter).
Nah, I'll just stick with the old tried and true .357 Mag.