Maybe I play a little too hard, but I have a terrible problem with aftertouch triggered controls. Something like a fill triggering, just because you got carried away and dug in a little more than usual in, say, a very emotional passage, and you are screwed!

Plus, of course, if you use aftertouch for vibrato, you can't turn it off for the lower section of the keyboard (aftertouch is global for the entire keyboard). Just too much of a compromise, for me.

How often, those that DO use this system to trigger fills, do you find yourself accidentally triggering the effect when you DON'T want it? Are you fairly light-handed?

About the only playing thing I like controlled by my playing (other than the notes!) is sometimes a very light use of the velocity/style volume (Dynamic Arranger in Rolandspeak), but even that is troubling without extensive controls over the window of time for the change (you can change amount, per Part, but you can't regulate the point at which it happens, or the length of time it 'holds' for).