Hmm... I heard Lost Magic and Deep Labrynth weren't very good on IGN and Amazon.com.

I can list some games that sound interesting:

-Star Fox Command (looks like alot of fun, but may be pretty repetitive.)

-Mario Hoops 3 on 3 (release, September 5th, looks like fun but also may be
pretty slow paced.)

-Harvest Moon (September 12th, pretty fun looking if you like Harvest Moon)

-Mega Man ZX (September 12th, I haven't seen any videos for this but it
sounds pretty cool, except for the fact that you don't play
as MEGAMAN!)

-Mario Kart (Supposed to be the best DS game out)

-New Super Mario Bros.(Supposed to be good)

-Trauma Center: Under the Knife (I have this, it's pretty fun if you want a
stylus operation game )

-Tetris (Supposed to be really good, never played though)

-Mario & Luigi: Partners in Time (probably the best "rpg" that the DS has
unfortunately.)

Yeh, I only have Super Princess Peach (Pretty fun, but EXTREMELY easy), Trauma Center, Castlevania: Dawn of Sorrow (just like the other castlevania games, alot of fun but over WAAAY too quick.), and Drill Spirits (Got it because it was cheap, keeps me occupied, but I wouldn't suggest getting it heh.)

I plan on getting Animal Crossing, tell me how it is. Sucks i'm on 56k right now so I can't use wi-fi. Probably also Star Fox Command.