Nothing irritates me worse than a terrible handshake. Let me tell you, professors and other academia do not know a proper handshake if it were to be demonstrated in a thesis project. What is up with that? I want to Fargo Flip anyone that gives me the wet noodle shake, the clammy fish shake, the finger clamp and go, or the slight of hand. WTF is that anyway? And who teaches someone those bad handshake habits? Do they pull it out of their ass?
When I was a cop, by gum, you got a nice firm handshake and a look in the eye-IF and only IF I chose to shake your hand and did not believe it was unsafe to do so. I did shake people's hands at appropriate times and looked them in the eye, then dropped the eye to the torso. Why? Because it's like basketball. You guard someone on defense by watching the torso in order to anticipate every move prior to the body making it.
Most times I shook hands, you ask? Yep. How do I know what qualifies as a "most times"? It's instinct. Believe it or not, I did refuse to shake someone's hand many, many times. It is a safety thing. Cops are often leery about shaking hands in certain instances because it could compromise their safety and puts them in a position for someone to grab their weapon (worst case scenario) or attack them, gain an advantage over the officer.
Cops do not refuse handshakes because they are rude.
So this is all I have to say about handshakes: GET A GRIP.