I've have family members that have Sun & Mercury in Aquarius: Dad, Daughter, Brother, and Cousin. They like to joke. They like to tell the latest gossip. They like to shock.

When my daughter was a teenager she complained to me, "I can't shock you." My response, "I grew up in the 60s."

i think so, with their unpredictable behaviour, can be dramatic if it interferes with their " principles"  or their way of life then the drama comes out. 

My husband said the other day that his mother (capricorn sun/Aquarius moon conjunct Aquarius jupiter)  is a "knowledge"  dropper. She just loves to drop knowledge all the time to random people lol

it might be her Aquarius placements pouring " knowledge"  out of an urn.  

I have a client with an Aquarius Mercury conjunct Jupiter in Aquarius. The things that come out of this man’s mouth blow me away. His Mercury sits right on my descendant. Never met anyone in the entirety of my life who thinks the way he does. He is intelligent as hell. He gets everything I say the instant I say it, and has insight to add on top of what I say every time. He does tend to preach, but that’s the nature of Jupiter/Mercury. 

Check out Aquarius!