I've been fooling around with this one since last night (had some stretches of fairly smooth chord changes practicing it just now, which is a big deal for me cause I never get decent chord changes on any of the F variations), and I think I favor the pluck-fifth-and-fourth-then-strum-the-rest style, although I certainly enjoy the all-strum version as well. but I mute the sixth with my thumb, and when I do that I seem to mute the first string on the Am chord with my hand on accident. this sounds like it would be a problem, but it kinda sounds interesting that way. like a little accent that pops in about half the time. it doesn't sound like the NIN or the Cash version, but it's kinda cool in it's own way to my ears.