A light colored interior is very helpful.
After my last vacation, a multi-purpose purse was on my list as a must have travel accessory. I wanted: light colored interior, ability to carry as backpack and purse, fits definition of personal item for airline travel, and easily holds everything I need for daily carry plus my camera.
I spent hours searching online, and eventually settled on Sherpani's Soleil lightweight travel bag. One can carry it as a tote (2 handles), a bag (one adjustable shoulder strap), and a backpack (two hide away straps). I believe I purchased it from REI (right before the coupon arrived from them, of course)!
And it is as a backpack that I carry it most often.
The Soleil held up well to rain and snow, and I consider it a practically perfect travel bag.
What I do not like:
1) The weight of the contents I typically carry on vacation is showing via stretching of some seams (nothing has broken, ripped, or failed). I do wonder how long this pack will last.
2) I wish it had a zippered internal pocket for my wallet.
3) The tote handles are irritating when carrying the purse in backpack configuration. They rub against my neck until I can force them away from my back. Looser/less firm handles, on the other hand, would cause a new set of problems. I will need to think on adjustments I can make, as I do use the tote handles, but would prefer them to be ... some other description.
I also carried this to the International Quilt Festival ... in fact, I haven't changed "out" of this purse since the Quilt Festival. Hm.