It's like GTA I heard. I might get bored of it afterall.
Is it more corny 60s Western style or more "modern", a 'la The Proposition, True Grit remake etc?
It's a mix of everything but most of the inspiration IMO comes from Leone's and later Clint Eastwood movies.
As for you getting bored, well you will eventually but you have to try it. Maybe you'll even play horseshoes/poker/blackjack/... all day like i did. IT IS NOT IN ANY WAY A MASTERPIECE THOUGH.
and you before me, don't argue about best westerns. There's plenty of them. Each decade had at least 1 and that might be an understatement.