Well well, I thought it would be nice to talk about the series, so… yeah.
I've only really played four games (the first three and Dawn of Sorrow), but I'd like to track down some of the other ones. I recieved DoS for Christmas, and it's quite addictive, but I'm stuck in Subterranian Hell. The use of the touch screen isn't much, but it's still nice (I sometimes practice Magic Seals to see how fast I can go). Favorite boss so far would have to be the Puppet Master.
As for the old ones... I like the first one best (not too fond of Simon's Adventure). I'm pretty sure I've never completed any of the games, which I'm intending on finishing DoS. That gap of the many other ones isn't something I'm looking to fill at the moment. I've heard many good things though about Symphony of the Night, which I shoulda bought a few years back when I saw it for sale at a Winn Dixie (no joke).