I bought this desk at IKEA, which I thought would be a totally useless shopping trip. Turns out, IKEA is affordable and fairly useful. This desk is far better than my old roll top desk that was only 3 feet wide and it has a bunch of drawers.
The other side is devoted to rod building/general man activities and a couple guitars and amps.
One thing that really helped me out here was the wall paper that the last owners put up:
Not only does my wife think this paper is hideous, it actually reflects the contents of the room (except the duck decoy and the powder horn, but I would take one or both of those too). I love it, of course. This space also contains a TV and a few speakers but I still need a mini fridge. Now I just need to find time to actually go into my man cave and use it... it is not looking good at the moment.