Configurable randomness. A particular beat has probabilities of containing eighth notes, triplets, or sixteenth notes based on the "Rhythmic Variety" setting, and those notes have a probability of being rests based on the "Rests" setting.
Totally original. I came up with it by looking at lots of examples and seeing patterns emerge. It's not perfect, but it turns out that checking a select few indicators is sufficient in the vast majority of cases.
This is pretty accurate. tl;dr: What I did wasn't great but it could have been a lot worse (see all the things I made it a point of not doing), and that gives you something to think about when it comes to data and privacy.