Shouldn't generalize about all Cap Moons here, as they could have any one of 12 Sun signs which would more or less trump their cap moons "daytime" personality..Moon rules the private self, and if a Cap Moon is showing their emotionless side, u better believe it's for a reason.
Saturn rules time limits, including death, so at any given moment, a Cap Moon could be dealing with some very heavy issues, which would make most ppl snap, break out in tears, or hide under the covers. This is that mountain of strength you would end up praising if you were ever in a crisis situation, as they would be able to contain their emotions, and focus on the task at hand.
Understand they can rub you the wrong way bc of your Aquarian nature, esp with "Aquarius sun, moon, and mercury". You are the archetypal wild child and rule-breaker, and Cappy is the stern parent and rule-maker whose responsibility it is to keep you in check. It's those fundamentally anti-thetical energies that you are sensitive to. But I think if you meet an Aqua Sun with Cap moon, you may sing a different tune! Im a Gemini, Cap moon, and when there's nothing serious to think about, Im just a big loveable kid
But when I have adult things to do, bills to pay, deadlines to meet, career stuff, reputation stuff, legal stuff, and all the things that suck in life, like anyone, u gotta get serious and do what needs to be done before you can get back to having fun again.
May I suggest you try and make a Cap Moon laugh? You may find they may have a wicked sense of humor akin to yours, and you may be able to tolerate them a bit more. Also what are the ages, and genders of the Cap moons you know? That may have something to do with it..Are they rich, snobby types? Bc things like that can make all the difference..Even nationality can factor in..