Being a California girl who grew up on In-N-Out Burger, I am inclined to choose nostalgia. Besides In-N-Out burgers taste great! Don't get me wrong. Five Guys is a really good burger too. I love the giant bags of fries you get with your order. Although their choices can be a little overwhelming. Not to mention the price at Five Guys. If I am going to pay restaurant prices for a burger, then I will opt for Red Robin myself. Some commenters refused to make a choice, because the restaurant offerings are too different to be compared. In-N-Out styles itself as an American classic, while Five Guys goes for the gourmet burger label. Which is your favorite?