So many good pieces of advice here. 😊
I love emojis, memes, and videos, but sometimes there is overkill that ends up detracting from the discussion.
Also, a comment about email since it's related to netiquette: I think responding within 24 hours is reasonable. Sometimes I get emails at work and people are really miffed if I don't respond within 20-30 minutes. I end up with a string of "Hello...did you see my email...I need a response..." and I'm thinking, "Hello...do you think I have nothing else to do than sit around all day checking emails?"