Those are too neat to be man caves. Here's mine, the spare bedroom on the second floor converted to my needs. Im not completely set up yet, just moved in last September. :
The shag carpet has to go as I have alsready lost many small parts to the carpet monster. The room also serves as my practice studio, so I have my stereo, bass and practice amp in there.
Mu current project isnt on the desk right now, its over in my "spray booth" on the left.
And my meager stash. Almost time to start an inventory.