Well of course. If you're even at least partially autistic, as you said in the past, this sort of methodical 'watch and learn' method of social interaction is the best way you can teach yourself - especially since it doesn't come easy to individuals like us. I mean, I've had teachers teaching me how to interact with people.
An interesting book I've neglected to finish reading(because I know most if not all of the info; I'm reading it because it is interesting) is Curiouslly Social and Socially Curious. It's for people who have trouble interacting with people... even though I recommend it for its interestingness, not so that I hope you get anything out of it xD!
But no, yeah, I get what you mean and I do the same thing... except I don't care about seduction (being an orange is weird, yo) so I pay attention more to everyone in all their circumstances to find how people generally are and how they generally aren't and how to determine, well, what people passively determine by stealing a quick glance at people.