I ramble about whatever is going on, make shitty puns, and use the same unfunny, done-to-death sayings normal people say. Like "works 100% of the time most of the time" which does work 100% of the time most of the time.

When I want to be more engaging, I turn my internal filter off and say whatever comes to mind. Somehow that works. Turning off the filter is the hard part. your mileage may vary