I've drawn in many types of sketchbooks over the past few years, I've been taking my sketchbook with me everywhere since High School. I decided to buy a sketchbook that could handle the abuse of travel. And so far the moleskine has been handling the travel.
Usually the spine of my sketchbooks break and tapped together to keep the book from falling apart. I've been carrying this book around for over a month and it's still holding up. Attached to the book is a pen with multicolored inks so I don't have to carry multiple pens. Plus I'll never forget a pen to draw with.
Here are some pages from my current sketchbook.