Heh. Mine aren't pruned for style so I can't speak to the aesthetics, but I *hate* the way many people trim Japanese Maples to look like they're wearing knee length skirts!
I have two healthy specimens growing in full sun in the front yard. I wait until very early in spring before bud break to check for winter lost branches -- the white brittle ones -- and I basically just snap them off. The larger branches that end with jagged edge, I trim after snapping off with sharp pruners, and some that are too thick I cut with pruning saw. Usually it's the middle branch that break off and you're left with a forked Y.
After they leaf out, I trim back only those branches that are so long that they're sweeping the ground to not touch the ground/groundcover (of wild strawberries -- Fragaria virginiana
) and branches that are obviously sticking out. I also thin entire overlapping branches a bit to let a little more light into the center. I do end up with interesting sinuous curves to the main branches.