Oh, 'bout the 3D function, it's mostly aesthetic anyways, and like Snowhawk said above, it's also a charge guzzler. It does look good on some games, most of them are better with the 3D off. Blazblue CS2 comes to mind.
Anyway what I'm saying is, don't make the fact that 3DS have 3D the main point of having that portable. Best reason for having a platform is to go after the games it got.
I for one love my own because it have VVVVVV! On a portable!
GIMMY!