MSD

Works for me. If it doesn't for you, just hold it back a bit and spray lightly. Because of the varying potency of different scents, I've started doing a spray on each side of the upper chest that covers the neck, too, a spray on one wrist and pressed against the other, and one on the back of the neck or on my hair (long hair projects and creates silage.) Go with what seems right, and for the first day or two, ask friends if it's too strong or too light. That method from the first post was when I was using EDP strength and potent EDTs like L'Anarchiste and Envy.
Get a wide range of what's popular, but also get some niche stuff that you can mark up and sell to people who want something out of the ordinary. Your startup costs are going to be obscenely high. Keep clear bottles away from UV light and keep the place cool. Have a coffee bar for customers. Make it look classy but still inviting to the average person.
They're trying to be the American Creed, and they're on their way there. They have some great scents and some that aren't so great, but it's definitely a place worth checking out.
Chaps, Sport, and Blue are the big sellers, with Black, Double Black, and Safari trailing behind, but they're all pretty good.