For me, drawing on a screen is simply another form of control. I really fail to find the act of using a touch screen any more exciting than mouse/keyboard or traditional D-pad and buttons. The only difference is that this stylus is far more cumbersome and uncomfortable, and that none of the mechanics of the games that use TOUCH have justified that particular control scheme to me. I still have VASTLY more fun playing games with traditional controls, and until they create a touch game with the depth and polish of the games I do like, it'll remain the portable equivalent of those DK bongos, made for jaded types who prefer novelty controls over developed, evolved mechanics simply because the Sony orthodoxy drives 'em crazy.
Hell, I'm hoping Advance Wars DS makes the stylus optional; same for Castlevania. I'd rather play both games with just the D-Pad and buttons, instead of holding the DS in an uncomfortable position and trying to tap on the screen.