I think that 3-5 is probably enough. The point is to see you in your habitat, not just what you look like or possibly looked like 10 years ago. Seeing how you spend your time, if you have pets, what's important to you, that's what we want to see. An outdoorsy guy may be different from Mr Bookstore, or musician, or the guy who likes the clubs. You know you're not all the same, right?