I was about to say to you that the way a "good" handshake is defined probably varies from region to region in this old world of ours.
But then, after finding this, I realized that you, being Greek, probably have some kind of inherited right to set a standard:
"It’s become so ubiquitous that you may never have thought about why people shake hands. The history of the handshake dates back to the 5th century B.C. in Greece. It was a symbol of peace, showing that neither person was carrying a weapon."
https://deepenglish.com/2014/07/handshake-history-listening-fluency-116/
That's very interesting isn't it? How it first started and then formed to the way it is used today. I have to admit that every time your comments are so informative and interesting! So thank you for that :)
It's also true that a good handshake varies from place to place so I guess I'm focusing more on "local" ones :)