Sure there is body language that can alert you as to whether or not you both are on the same page, and or a good fit. For me, being rather detail oriented, I have no desire to be with smokers, or spear gun divers, or those with little regard for our planet. Macho men/women who think they can harm the environment won’t cut it either.
So, if I link with a new buddy who gets out of their vehicle looking like they’ve been ridden hard and put away wet, with unkempt hair, smoking a cig, bloodshot eyes, smelling like booze, and a hodge podge or equipment, that’s a pretty good sign that they will not have your back, let alone be in control of their own life.
Those who don’t talk about the dive, who just descend without being in sync with you, are more examples of those you ought to be leary of. Additionally, if their conversations tend to lean towards partying or heavily self-centered, that’s a pretty good indication of an imbalance as well, just like comments that are predominantly negative.
Another great guage is whether or not they are happy people who smile a lot or not.
Meanwhile, for me, good buddies smile a lot, like to talk and actually be friends, share expenses with each other when commuting or bringing goodies, truly want to help each other and have a good time while staying safe and continually learning.
So, what do you look for?