Yes, I play DQ and Final Fantasy games. Not as much as I used to though.
For the DQ series, I've played I through V, and VIII
For Final Fantasy, I've played I, IV-VIII, X-2 and XII, as well as spin-offs such as FFT, and FF1-3 for GB.
As for SRPGs - they can sell. Remember, America is the home of the SRPG in certain series such as Fallout and Betrayl at Krondor. Also, some SRPGs like Disagea sell better in the US than Japan - also, FFT nearly pulled a million here, so I think that's pretty good for a hardcore Iso-RPG.
Having said that, I love Blue Dragon to death. I'd place it up there thus far, somewhere in my top-20 RPGs of all time (somewhere in the #15-20 area).
About Eternal Sonata and Co-Op (having played it extenisvely in the demo).
The co-op is quite a bit better than the older-school FFs. It follows the same concept as you can select each controller to play one of the 3 in-battle characters (so upto 3 players). Since the battles involve button-mashing and ARPG-style gameplay, it's far more involved than a turn-based system.
It makes for quite a bit of fun, and is the best co-op JRPG I can remember playing. That's certainly not saying much of anything, but is certainly something good.
Back from the dead, I'm afraid.
