Me encanta un hombre en uniforme.

Encanta literally means enchants, but it translates to love in the way one would love a thing rather than a person.

"man's"

If you are intending to refer to a uniform that belongs to a man, then the correct placement of the apostrophe is as you have it. This is called the possessive form.

it depends what kind of uniform it is. if it is a boy scout uniform, that's kind of geeky but if its a school uniform, that's hot.-especialy with a tie.

Yep :)