Looking back through old sketchbooks and the like is something I don't do often, but it's always interesting. I notice little things I've stopped doing, and decide if it was for the best or if I should consider trying again. I notice how much my "style" has changed. For instance, I use a lot more color now. I know the scans above don't give a completely solid idea of everything I did at the time, but it was a lot of black and white and nothing else. So basically I'm a lot less afraid of color now, and I'm pretty proud of that. I don't really know what else to say, but I can see that I've improved in my own eyes at least, and that's important. Take a look back at where you were a year (or three) ago. Do you see how far you've come?
* I also used to use my sketchbooks as diaries, so the fussy lines were angsty teenage rambles. Fun.