Why do some people dislike the nintendo 3ds?

its annoying and its getting on my nerves i love the nintendo 3ds it rules and its awesome and yet people say the 3d gives me a headache well why dont you shut the 3d off?geez no one is forcing you to use 3d and they say it has bad graphics thats not true what so ever its graphics are so good its now competing with the psp so sony has some competion now and also the game launch titles are great and the fact that it has netflix and virtual console makes it even better so why do some people dislike the 3ds its annoying when people say the 3d makes me sick well just turn off the 3d i barely turn on the 3d