Well, I recently acquired both Castlevania and Trauma Center and both are great in their own way. Castlevania is the same Castlevania you played in SOTN and the 3 GBA games, but I believe it is probably the best one yet. The graphics are better than SOTN, the story is good for a Castlevania game (probably not as good as SOTN's flashbacks), and I absolutely love the soul collecting gameplay mechanic. It makes it a great game to pick up for 10 minutes, try to get some souls, flaunt your badass powers, and then turn it off.
Trauma Center is very, very different. Its gameplay is essentially a game of memory with some tricky stylus motions required. If you are looking for something very new and innovative, go for it.
Then again, Ace Wright is getting great reviews, so I don't know what to tell you.