I have been replaying RDR some lately. I wasn't a huge fan of the actual gameplay but the world and graphics were awesome. Maybe Rockstar's best yet, and that's saying a lot after the GTA series. I tried multiplayer but it sucked. I think if you had a group of people you knew who were playing, it would be a lot of fun but getting on and playing with strangers, not so much so.
Right. When the game first came out I tried online multiplayer but never really went back to it because, like you said, it's not that much fun alone. But with buddies it's fun attacking gang hideouts and doing the challenges with a team member. At this point in online play, you don't have many lone wolves rambling around doing whatever... you have a handful of 4-man posses roaming the map. They're usually highly ranked and have the best weapons, so me and my RDR buddy usually try to wait until we can get one or two of them separated from the group. But taking on a whole posse is suicide.
I usually at least try out any game I get online. Of course I'm addicted to BF3 online on the PC, but so far to me RDR is the most fun I've had on a PS3 multiplayer game. You can do the challenges where you're taking on computer-controlled bots or you can be brave and take on the other human-controlled characters. Just the fact that it's still an open world, and the element of virtual danger with the other posse's running around. And the world and graphics keep me immersed.