I have since added a Mr. Heater natural gas furnace and a few more signs, like I really needed more. I'm thinking about a floor now. I put the siding over the drywall a few months ago and it's insulated real well.
This is my attached garage so my truck and a minivan get parked in here everyday. I have another 18x22 garage out back which has all my junk and my GTO.
I'm considering VCT for the floor but it's been painted before so I may go with a Racedeck style tile but that's a little more than I want to spend.