Always fun to go through old sketchbooks XD I've always bought half decent ones because they definitely do feel a lot nicer to draw on, though I've never really splurged because I don't draw much (I have a sketchbook sitting in my drawer that will never be filled, the two that are in said drawer do contain a lot of sketches and notes for my project that I keep referring back to).

Very much unlike mine, all your old sketches look amazing XD