I thought about the N-Gage, I'd say it's a close call. At least N-Gage had the excuse that it was trying to be a phone at the same time and had competing design

I thought about the N-Gage, I'd say it's a close call. At least N-Gage had the excuse that it was trying to be a phone at the same time and had competing design goals, but they also improved over a lot of the flaws less than a year later with the QD. (And Nintendo improved the GBA with the SP and the DS fat with the DS Lite.) Now 10 years later Nintendo is stepping backwards... Mono speaker on a gaming device in 2013, seriously? There's also so little symmetry, at least the N-Gage has taco-symmetry...