I wish someone would make a revolver in 10mm that headspaces on the case mouth, similar to what others have done in .45 ACP, no moon clips needed. A 1911 and a revolver chambered in 10mm, that really captures my imagination.
I'm a big fan of the .357 round, and from what I hear, the 10mm is the closest thing you can get to .357 performance - .357 sig is equivalent to the most mild .357 magnum rounds, not to the true potential of the magnum. But I'd like to be able to pack both a semi-auto and a revolver with .357 MAGNUM power, without having to lug two separate kinds of ammo.
Anyway, I have strange predelictions, I'll admit. But still....