Drawing on "Paper"

I love drawing, and I always do elaborate doodles when I am in meetings or attending lectures.  My university notebooks look more like sketchbooks; you have to read between the pictures to see that I majored in English.  When I recently got an iPad, I immediately looked up drawing apps.  I've enjoyed Sketchbook Express.  I used it to do the background image and avatar on this blog; however, I never felt that I could draw as spontaneously with Sketchbook Express as I could with traditional art supplies.  I have now discovered Paper, by Fifty Three, and I am very excited about it.  Here are two pictures I've done using the Paper app.

While Paper isn't a replacement for actual paper, I've been having a lot of fun with it.  I look forward to experimenting with it further.