A friend of mine, who usually listens to my recommendations, just doesn't want to give Red Dead Redemption a chance. He says he doesn't think he will enjoy the game after the novelty of playing as a cowboy wears off.
I myself only got around to paying RDR in February so I was also a long-time skeptic myself, but after playing it I thought the game was incredible. I told my friend that I was once in his position and that at worst, the gunplay is a bit easy/repetitive and the game starts off slow, but you'll be willing to overlook that given how well written the story and characters are.
I think I'm slowly starting to change his mind, since I've recently gotten points for recommending him games like Saints Row 2 and Arkham Asylum.