Yes, I own a Beaglebone Black. But the operating system and the ecosystem surrounding it is oh so aweful compared to simply-Debian it-just-works Wheezy for the Raspberry Pi.
That probably doesn't matter too much if you are building some embedded thing, but I am mostly using my Pi as a web server, and I like that is so easy to set up and configure.
I own 1 rpi and 2 BBBs and all work just fine. I have the rpi 24/24h connected to a relay board and other things but tend to prefer the BBB due to the better CPU and easier to keep up to date with regular distros.
Relatively easy to get a server going on it, and lxde running as a GUI isn't too shabby (noticeably better than a GUI on the PI).
Only trouble with BBB is the lack of hardware accelerated graphics support (BBB has a graphics chip, but it's not working in any of the current kernels)