I'm actually fairly excited about this. I've never played a Dragon Quest game before, but I like the light-hearted look of things. As far as RPGs go, I'm still looking forward to the new Golden Sun even more though. We need more information about that game!
DQ9 seems like a bit of a departure for this series. It seems way less focused on a story and characters and more on doing missions and quests. I'm sure it's gonna be great, but I'm also a bit apprehensive.
If you've never played a DQ game before I'd definitely recommend checking them out. I wasn't a bit fan of DQ8 on the PS2 but most people seem to love it. It sure was a beautiful game.
On the DS, I loved, loved, loooved DQ5. It completely turned me into a fan of the series. I'm sure I gushed about it here already. I highly recommend checking it out.
I loved Dragon Quest VIII and V (and the under-appreciated Rocket Slime) so IX is on my radar, though I'm a tad bit concerned with the changes. It does kind of seem like it is more online-focused now (then again that is what I thought about Monster Hunter Tri and I'm enjoying that solo...)