When my children (2 and 5) use the wrong words or grammar. For example, right now my 2 year old keeps pronouncing coffee as "fuck-ee". Each morning my wife makes coffee and Avery is standing there and talking to her saying over and over, "mommy fuckee, mommy fuckee". We correct her each time, but a part of us wants her to say it wrong just a bit longer. My favorite was when we were walking at the beach in the morning, drinking coffee, and she shouted "mommy fuckee, mommy fuckee" in front of a large group of people.
Bedtime routine with DS (5). We read 2 books, then "snuggle", which means I lay there in bed next to him for a while. Then I tell him, alright, I need to head to bed. And every night he says "Daddie, but I want you to snuggle just a little tiny bit longer". And then I say "yes, but just a little tiny bit longer". I'll be sad when he stops asking that.
Watching someone who is the best at what they do, usually regardless of what it is. Human potential, the human body, and the human mind is an incredible thing, and it's neat to see people who excel at different things.
Seeing things done in an efficient manner:)
Playing on Excel and doing my monthly net worth updates
Producing winning tennis teams as a coach.