An inevitable consequence of the passage of time. Possibly.

Once upon a time, I most most definitely a sock-sock, shoe-shoe person, but I've somehow become a  sock-shoe, sock-shoe person of late.  I'm thinking it has something to do with me now wanting my otherwise clean socks not to touch the floor before going into my shoes.  Not that my shoes are clean by any measure, but particulate matter in the shoes annoys me more than it used to.

Also, documentaries are the most fascinating things to my brain now.  Among the many films I've seen in the past year, easily the two most transfixing have been the absolutely excellent Blackfish, and Mitt.  I'm typically someone who squirrels about and restlessly fidgets about (to varying degrees, depending on the film), but both these films had me more or less glued to my seat.

I don't think these are purely products of age & acquired maturity, but I can't really tell; it might just be changes that come with the gradual evolving of personhood.