I really love the 3DS. I thought many of Nintendo's DS entries of its main franchises were weak apart from Advance Wars, Kirby (Canvas Curse), and some others.
That isn't meant to throw shade at the DS, as I really enjoyed the system from both Nitnendo's games and third parties', but the 3DS has better Nintendo efforts, an even greater catalog to me thanks to the eShop, and there aren't as many unwanted touch screen instances that are just there to try to innovate when no innovation like that is really needed.