Man shop Ideas

[Critter]

I am trying to save up and build a shop sometime in the next few months. I know a few basic things that I am shooting for. I thought I would bounce it off of the brilliant minds here and see if I am missing anything.

60x40x12ft tall metal building
6 inch concrete slab
2 large doors (probably roll up but maybe barn style) and 1 man door
Fully plumbed for multiple air outlets
High bay fluorescent lights because I HATE dark areas when I’m trying to work
Eventually a lift of some sort, still haven’t decided exactly which style.
Vented roof and an exhaust fan for the Texas heat
I don’t think it will be insulated in any way.
Some sort of floor sealant…still deciding on that as well
Plenty of electrical outlets for power tools including my cracker box welder, air compressor, maybe even an upright mill and lathe if I can find some nice used ones.
Some sort of internal structure that will support a 2 axis overhead hoist
Of course lots of bench and work areas along with storage bins

So anyway, is there anything that I have missed? Any tips or suggestions that I should know when planning construction? Anything you wish you would have done differently when you built yours. By the way, this will be behind my house and I plan to spend A LOT of time there so I want it to be perfect. I plan to use it for everything from restoring cars/trucks to changing the spark plug on the riding lawn more. Not to mention my everyday tinkering and playing around (beer drinking).