Professional Trad climber
So I don't think I do have one arm that I favor in climbing, but I think it's probably normal that most climbers have certain strengths and weaknesses within each side of the body. So, for example, I know that on my left hand, this particular finger-strength grip is better than on my right hand, and on my left side, I know that if I'm doing this particular move, it is stronger or weaker on the left side than it is on the right side, for example. And I think, yeah, each different body position each different grip do have subtle differences on each side. But I wouldn't really say it's something you take notice of when you're doing projects and actually climbing, but it is something which you could take notice of if there's a big difference in the strengths of either side of the body. And you might factor that into your training program when you're doing it.