Welcome to Basenotes sjd123,
I wouldn't really let a cologne's popularity decide whether or not you would wear a particular fragrance. Most of the general public wouldn't even be able to tell what you were wearing and would most likely only form an opinion on whether they like the fragrance your wearing or not.
Dior Homme, for example, is an absolutely fanstastic, albeit very popular, fragrance which I would not hesitate to wear in public. Armani code, on the other hand, is something you would never catch me wearing (publicly or in the privacy of my own home) but this is due to reasons other than its popularity.
The main point I think you should be considering is whether or not you like a particular fragrance and how well it meshes with your own skin chemistry.
Hope you find the resources here on Basenotes as helpful as I have!