Hm, weird, back when the 3DS as launching the SDK would set 3d off as adusting both render agents to the same xzy and direction, thus it was always rendering the full 800x240 even when set to 2D, with the above information it seems what they've done is changed the SDK to disable one render agent and pixel double horitontally to span the odds and evens.

I'd have to look into the newer SDK more to figure out when they did that change, but since I haven't worked on a 3DS project for years I doubt i'll get the chance.

I still much prefer the look of the display in 2D mode than the 3D mode, the more standard pixel size looks nice than pixel doubling across the horizontal under a paralax barrier

i use it on the go and it kills the battery too much

Cutscenes? all the times! Gameplay... Just some games

About 75% of the time. For some games it is amazing, like Kirby Triple Deluxe, Resident Evil Revelations, Etrian Odyssey Untold: Millennium Girl and Fire Emblem Awakening. But for Smash, I rarely do. I just don't hold the 3DS stable enough while playing that particular game to make it work. Same with Monster Hunter 3, even though I do have it on maybe half the time because it is good 3D. I really like the feature, it is something you can't get anywhere else (especially the without glasses element). It's just such an awesome effect, almost magical when I first saw it, like looking through a window into the game. This is a major reason for me being interested in the New 3DS; the face tracking super stable 3D would be amazing to have.

I play a game in 3D for the first time... then probably not....

Depends on the game, but for most games I use it. I was toying with the idea of getting a New 3ds just for the stable 3D, but I think I'll wait on that.

Initially, I used 3D for a little while for Luigi's Mansion Dark Moon about a year ago, but after that, I haven't really used it sense.

Never. The 3D is garbage.

I am surprised at how relatively even the poll is.

Yes. I only turn it off if I want to save the battery or if I'm in a surrounding that makes concentrating on holding the focus difficult. Both is seldom the case.