Ocarina of Time is pretty much my favourite game ever. Only Halo comes close to the love I have for Link's debut N64 adventure.
I have never really got into the DS, I bought the missus one and have a play on it once in a blue moon but the 3DS... Awesome. Just awesome.
As ste hicky said, 3D is secondary, an enhancing feature for the most important thing... the games! Seriously... Ocarina of Time, Star Fox, Snake Eater, Kid Icarus? Sick. So, so sick.
I'm there day one!