New garage to be built need your input

[Crush]

Ok the time has come to build a new garage. This garage will replace a 2 car garage that was built 60 years ago and isn't large enough to hold all my STUFF. I would like the new garage to be a minimum of 4 car, maybe even larger. So my questions are:
1) if you were building a garage from scratch to be used to store cars and motorcycles what would are some of the watch outs? meaning what do I absolutely want to include or exclude
2) Thinking of ceiling height and depth of garage, am I better to go 2 cars deep as well, have the option to stack cars? or both?
3) Heating, radiant or forced air?
4) Flooring-epoxy, stain, plastic, or?
5)lighting- LED, Fluorescent?

Open to any other suggestions. I am in the plan stage so your inputs would be helpful