I picked a 5. It could look a lot better, and it could look a lot worse too, especially if it was longer, but I have to keep it short for work. I do own 5 different wigs though, 3 shoulder length and 2 bobs, which makes it kind of fun to switch back and forth for different occasions during the same week or weekend. It keeps friends guessing, lol.
If I could wear it as long as I wanted, it would be at least down to my shoulder blades, then I could learn to braid it sometimes too. Women can do so much with their hair, compared to a guy.