Re: What is better in poker: bluffing or playing only with good cards?
Bluffing with good cards 
you can act like you are not sure in your cards and only reply on bets of other people who will raise the bet thinking that you are weak, but in the final you are going to have all.
you can act like you are not sure in your cards and only reply on bets of other people who will raise the bet thinking that you are weak, but in the final you are going to have all. Yeah, that would be our favorite kind of bluffing for sure. But on the other hand, who knows when do you have "good cards"? I mean you can be 100% sure about that, having a straight flush with the highest card being in your hand, but with lower hands it's complicated. You can be performing a reverse bluff, from your point of view, having 4-of-a-Kind Aces, like Motoyuki Mabuchi in this video:
https://www.youtube.com/watch?v=AgOlflDqMD0
and then lose as he did. So, although poker is called a game of skill, whether you win or lose depends on chance more often than not. At least if I lose, I always think that's because I was unlucky.
