The only thing I hate about Nintendo's touch screen is the possibility of losing the stylus.
Yeah, but let's take a real poll here: how many extra styli/styluses do you have lying around? Me, I have about 6 or 7 hiding around the house. I think I got a 3-pack of styli and a cleaning cloth from a Gamestop bargain bin for 2 bucks, and I got another 4 from a Toys R Us 2 for $5 DS accessory sale, where I got a really cool belt-clip DS case and I just had to get something else.
Having an iPod Touch and a DS I would say that I definitely prefer a resistive screen for gameplay. I can see why the i devices use capacitative, for all their functions it is best, but for games it isn't great.
I also have a touch and a DS, and I would go further and say I prefer resistive period. I accidently press stuff on my touch all the time-- it's just too sensitive. And then, there's the stylus thing. My fingers are too big, the buttons on the Ipod are too small. If I had an Ipad, this would not be an issue. If I had no need to press small buttons on the touch, this would not be an issue. Unfortunately, this is not the case. When I first got the touch, I tried to used a stylus on it and found that it didn't work-- then I read about capacitive and the electrical signal it requires, etc... and I thought "that is the stupidest technology in the world."