my favourite scents on guys are giorgio armani acqua di gio and davidoff cool water. the reason I like them is because they're very light and fresh and smells almost natural, not thick, musky and suffocating like a lot of the other colognes.
Personally I love the smell of someone who's just stepped out the shower rather than somebody who honks of cheap aftershave. Although my personal favourites on a bloke are Ralph Lauren Blue that smell gorgeous and Farenheit for me...a quick waft can be very sexy but someone who drowns themselves in scent is total turn off!
Everyone's personal preference is different. I have no idea the name, but I like the one that comes in a blue bottle that looks like a man's body. The only thing is to not overdue it. That's worse than not wearing anything at all!
I didn't wear any for a long while and when I decided to start again I went to a store that only sold perfume and colognes and asked the girl working there to pick 5 she liked the best. Out of those I smelled each of them and the two I liked out of those were Davidhoff Cool Water and Kenneth Cole Black.
But whichever ones you pick don't overdo it. Less is more when it comes to cologne and perfume. Especially with scented body washes and deodorants mixing with everything.