I really love all my accessories - I switch my charms between some of my bags. I have a couple of mini skinnies and wristlets that I can interchange and find really useful for keeping my license, debit card and money in for quick access, and I've been using my Hamptons Stripe wallet ever since I got it and it's great - it fits a ton, but still is flat!
Ok, I know that's not a very direct way to answer the question, but it's so hard to choose!