sketchbook pages

Here's some sketchbook pages from the last couple of weeks. most of which are people on the train, not that you can tell. i need to get used to drawing my whole environment.

I recommend Kristian Antonelli for an excellent example of this

here you go

Here's some old and new pictures from my latest sketch book. one of my bro(i just had a good look at it and the back of his head looks wrong), one of my girlfriend hard at work, and two pages i did on the train (the weird dude with an eye in the middle of his head wasn't someone on the train). i need to draw more on the train, i need to improve my quick drawings, use less lines or something.
Anyway, let me know what you think. give me some pointers.