Well, to answer all of your questions, I think a true gamer is a gamer who just doesn't devote all of his/her time to video games, but ones who thinks of E3 like a holiday or beats almost every game that is given to them or never gives up after having a few game overs.
(*coughs before giving a speech*) Eh hem (beware for wall of text)
Okay, so remember the saying "You shouldn't judge a book by it's cover?" Well, it's pretty much the same thing for video games- you shouldn't judge a game by it's graphics and reviews. Skyward Sword could be the best Zelda game...