Well, this depend on person. I personally think someone who:
Has a positive attitude towards every situation.
They are self confident people
They are mature with quality of their thoughts
Honestly
Integrity - he will stay true to his word and true to himself.
Faithful
They act direct
Polite, respectful, considerate and attentive to a someone's needs
(but then again you don't have to be like this to be a man)