I'm not a huge fan, and for a bit surprising reason I guess. It's so f*cking HUGE!!! I was first in awe of the world, but when the single player closed to the end of the story, and you needed to ride from south-west to the north-east. In the desert. Which is very deserted. With a horse. That's not a 500cc, two-stroke, sandshoveling weapon out there. Or anywhere. Everywhere you wanted to go, you'd either walk, or ride. And in the end I hated walking even more than riding. And then the wildlife would come and make it's move. Or some random robber or what ever those enemies were. And out of gazillion square miles of the map, I always used the exact same routes to the exact same few places. You had to move around quite a bit, and I ain't a great fan of riding horses in games, in desert, it seems.
It was really close to being a great game for me, but the downsides were a little too infuriating for me, and it really made me sad. I wanted to like it a lot, but clippity-clop-clippity-clop-clippity-clop-clippity-clop through the state was a bit too much in the end. Hopefully there will be a work-around in future RDR to this, I'd even like a hybrid-semi-scifi wild west with steampunk cars more, but I think I'd be very alone with that. Maybe if the horse can do flips and barrel rolls out of great heights?
Wasn't there cars in the last place of the story, way up NE if i remember correctly? I think I stopped playing in the same instant (within a minute) I saw first car, as it was such a whiplash on my face - I had cursed that stupid donkey of a horse for hours, and then it turns out that there are CARS in the game. It was just too much for me.
So I didn't like the big, open world, and cars. That really is a surprise, even to myself.