I suppose I'm a bit anal then ! - I use clutch less changes because, when done properly, they're quicker, slicker, smoother and easier on the engine and clutch. BUT, to do them properly (especially down-changes) takes care, skill and precision in matching RPM's, as well as good hand to foot coordination, that most riders don't have the patience or ability to do.
I take it as a challenge to get this right. The smoother and slicker I can be, to my mind, the better rider I become.