I had one perfect wallet a few years ago. It was the first time in ages I wasn't always seeking out a new wallet, it fit my life so well. But then someone swiped it out of my bag and I've spent the last 2 years looking for that elusive, "perfect" wallet.
Now I have 5 wallets, each serves a separate purpose.
The first one I got after mine was stolen I grabbed in a hurry, a Kenneth Cole black leather mens bifold wallet, which was the right size to fit my stuff and was inexpensive. I still have it, but almost never use it.
The ones that I do use are:
1) a black leather
Coach medium bifold wallet
2) a red leather Monsac clutch wallet
3) a canvas and leather zebra-striped Coach accordion clutch wallet
4) a brownish Marc Jacobs quilted ursula zip clutch.
I'm rocking the MJ clutch right now, but keep the other around for use with different bags.