Nice job.
I also have an L shaped basement as a result of constructing a laundry/storage/freezer room. Currently in the midst of building a bedroom in the long end of the L for our oldest daughter. My wife suggested that I continue the present wall of the laundry room to close in the short wing of the L to use for my work area. The 24x45 area that is left is going to get a 81" LCD projection video system w/ surround sound. Can't wait to watch some hunting videos!
Thanks to all who posted pics, theyhave given me many good ideas. I have been thinking a little about how to lay the area out, it has been good to see some of your set-ups.