If the scent isn't one of those that sucks the air out of the room, I like to have an idea a fellow's wearing scent from about 2-4 feet away, if that far. The impression one has bathed in perfume is not compliment-inspiring to me. If it's a person I know quite well, oddly enough less is much, much more.
Probably because my fellow isn't into scent at all, and oftentimes smells of whatever machine lubricant or solvent he's been using in his tinkering... and of sunshine-warmed skin and perhaps the shampoo he used. He smells wonderful to me anyway, and has the courtesy to shower off any more industrial strength stuff he's accumulated in his tinkering day before we are too close. I grant him that courtesy as well.
(which is to say it depends upon the person, doesn't it?)