I know what you mean, I love the sketchy look more than anything. It's like being able to actually feel the shape of the drawing. That's probably why a lot of my stuff look sloppy lol, I just have a hard time doing clean lines.
I also have a bamboo fun! Low priced and reliable. The size is okay for me even though I have huge hands. You should use it for often, it'll feel more familiar in no time.