I'm honestly far less positive than most people about RDR... it was disappointing to me...
The singleplayer is the one thing I just CAN'T enjoy, no matter how much I try. I appreciate that Rockstar is trying to go a new, more realistic direction with Sandbox gaming instead of just making the typical wacky, silly sandbox, but it just won't CLICK with me for some reason...
I suppose a lot of it is the fact that it rehashes the same "America is corrupt" theme that GTA4 had, and the fact that Rockstar is trying to milk that cash cow as hard as they can. Not to mention the writing is pretty questionable at times... (And not just "ambigious", either, which is the unfair and easy way out of explaining faulty plot points)
Multiplayer is pretty fun, though, and it's probably the only reason I haven't sold it yet.
But despite my criticism, it's not a bad game. I just don't really like it.
The surprising part is that I LOVE Western games, and I enjoyed Gun, Call of Juarez and it's sequel, and a few other western games, so not liking this is a bit odd for me.