I wore No.5 out in public for the first time not too long ago... I love the scent at home (I find it very mellow and relaxing), and I thought, hey why not - I'm out for the evening for fun anyways. I won't wear No.5 at work in the office, but I put a bit on as I headed out and I had no issues.
Other than Miss Dior (don't have) and Tabac Blond (on the way), I think the others are all great! They each have a time and place, but of those that I've tried, I'd say No.19 is the only one that I'd be willing to wear literally anywhere. My vote's for No.19 - not necessarily because it's "more suitable" for a guy, but simply because it's "more suitable in more places and occasions".