It's not very good or very deep. I bought it for $10 and still felt it was a waste of money and I LOVE Dragon Quest games.
You'd be better served playing Tales of Symphonia on Wii. It's more of a traditional RPG.
Dragon Quest X is coming out in 2010 and will be much more to your liking.
Monster Hunter 3 is coming out late this year, but it is nothing like Dragon Quest or Final Fantasy.
But in the near future Arc Rise Phantasia might be something you want to look into. Or if you are into strategy, Little King's Story. (Both published by XSEED)