If you care about games and game design, you really should play at least until chapter 3 (inclusive) of Trauma Center: Under The Knife. Atlus really made some very interesting design decisions and surprises using the touch pad game mechanics and the "language of gameplay" (more on this on another post) they establish with the player.
Even if you can see some flaws, there's some real brilliance in some of the things they did. I am not finished though I am in Chapter 5-2 (I understand there's only 5 chapters?). Very very interesting. I can see now how much more they can expand with a sequel and it would be simply really really good.
Good job Atlus.