Wow...very nice, Arcy! I especially like the floor. Did you do that yourself? That really looks great.
Chris, I think that's more than a start...looks like a great place to um...sit in your car...uh...when you're...well, you know...not driving it...
I put in 4 incandescent flood lights on one switch-one in each corner-for times when I just want to run in and grab something and don't want to turn on the fluorescents. I used 24 4 foot 2 tube fluorescent fixtures in 4 rows of 6 fixtures in my 30 x 40 garage with a 10' ceiling, switched in 3 groups. I don't think I need any more light but I wouldn't want any less, either. Your local electrical supply house will have a computer program to figure out how many fixtures you need.
I set all my electrical outlets at about 48" off the floor and put 220V outlets near each overhead door and a couple along the long wall so I can plug in a welder or plasma cutter anywhere in the shop and reach out the doors. I also framed in and wired boxes for air conditioner units but haven't installed them yet.
For a great heater, check out a Hot Dawg. I used one of their medium size units, about 110,000 BTU's, I think, and I love it. It's up in a corner, out of the way, and heats the garage up fast. I did put heating coils in the floor but haven't ever bothered to hook up a floor heat system because the Hot Dawg works so well. I have ceiling fans in the other three corners
I just used OSB board for the walls and plan to paint it white...someday... It's strong enough to hang stuff on and won't dent unless I really whack it with something.
Definitely you need an air compressor and 100' or so of air hose on those handy reel things in several different locations, preferably near the overhead doors. Parts washer, bead blaster, maybe a powdercoat booth and an oven, a lift, door openers, pull-down work lights, fridge, girlie pictures, shelves, racks, etc., etc...
Water would be really nice. I put pipe in the floor for water and a drain but haven't trenched in the service from the house yet. When I do, I'll also bury phone wires and co-ax lines so I can put in a phone and a computer if I want.
There's always something...
Lowell