I rarely laugh-out-loud. That's probably one of my own personal quirks and indicative of some sort of pathological shame-thing; as opposed to being specific to my Type. I just smirk slightly, or laugh in a weird, almost muted way and cover my mouth. Hardly ever are there actual vocal sounds. I don't think I've ever giggled in my entire life.
I do find myself amused often. Either from watching others, like, personal moments between groups of people I don't even know. Hearing bits of conversations. Rarely do I point these things out to someone I'm with at the time. Almost a sort of, "well, ya just had to be there.." sort of quality.. though they were standing beside me the entire time. If that makes sense. It's times like that, when I get this little smirk on my face, and my friends wonder what the hell I'm thinking about. I have an INxP friend who picks up on a lot of the subtlties in our surroundings that I do.. so we're both just walking around, or sitting.. laughing to ourselves, together.
I am not outwardly amusing too often. I don't try to be. I don't particularly try to be anything. The points in time where I make others laugh are often unintentional on my part. I'm huge klutz. I embrace it. Friends literally keep count of how many things I drop in a day. And I just hang my head and laugh inwardly. Sometimes people seem amused about how I word things, or describe things. Random, cynical remarks stated matter-of-factly, as I move along to a lighter topic without missing a beat. No anticipation of laughter. I may make terrible puns on rare occasion... which is very intentional, on my part... They typically merit the response from my closest friends: "...I hate you." That for some reason makes me laugh the most. I love watching people react. And just watching people.
But yeah.. most of the things about my personality that amuses others are, or seem to come off as, very unintentional, and subtle. My acting teachers have always stressed how the best comic moments are when the actor does not anticipate the laughter. Guess it's about remaining genuine.