When Geno talks, I listen.
I've had the privilege of playing Geno for many years and talking pool with him. When he first started playing again I was pretty skeptical of what he was saying. Then we played a few $100 sets of 9 ball on a 9' diamond with shimmed pockets and he just ran me over without missing anything I can remember for hours. He got me curious to say the least.
Since then he's showed me a number of things about pool that I had never thought of before. Some have made a big difference to me. Others I haven't figured out how to work into my game, it just doesn't make sense to me. But one thing is for sure, even those things I don't understand I don't dismiss. When it comes to pool Geno has a profound understanding of the game and he is not to be eye rolled. The man built himself into a table running machine and is passionately trying to share this with others.
He's no spring chicken and he has fought really hard to overcome a lot of health issues and still fights the best players in MN through grit and experience. He knows his personal pool journey isn't going to lead to world titles in his future at this point. But he hangs on and fights hard, and contributes his experience to the next generation. Trust me, he's not getting rich doing this, he is not Kevin Trudeau.
Now, we have every right to challenge what he says, and you can debate if you don't agree with any of his ideas. I don't question his accuracy but sometimes I find things harder to understand intellectually than to just do, and I understand overthinking things can be an issue. But then again if you're not getting the results you want you have to be open to new ideas. Either way, I never question Geno when it comes to his character or his credentials (or his pool game)!
OK, as to his specific question. I personally don't notice a huge difference between left or right, but if I had to guess I'd say I might have a slight preference for right spin. I am right handed and I remember Robert Byrne saying right handed players preferred right spin, and visa versa. I am now wondering if it has to do with how I'm viewing the cue ball. I know Joe Tucker has a 'Third Eye Trainer' which I've used, I learned a few years ago what I thought was center was actually a hair to the right. I'm all ears as to the answer from Gene.