Here's a perfect example of why I love Etsy. This is a custom order messenger bag I just completed for a Etsy user named Mary. It was a very cooperative project, and we talked back and forth for a few days so she could design the bag herself. After some discussion about how it would be used, Mary chose the style of bag she wanted, and picked out the fabric. She even picked what colors the pockets, straps, etc. would be, and I made it as a custom order.
It was a really fun bag to make, and it turned out so nicely that now I want one for myself! Truly, it's going to be hard to part with this one. I wouldn't have thought to put red with this fabric, but it really works well. I love the inspiration I'm getting by working together with other creative folks.
Etsy artists are very open to making things to fit your needs. If you don't see what you want in a particular shop, just contact the seller, through their "conversation" link. In many cases, they will be happy to work with you, like I was. You'll never see this bag at Target or Wal-Mart, but Mary will use it knowing that it's just what she wanted.