Yes, I wish we could go back to the days when not all men could become a Gentleman and men would strive to be honored with such a title. If this were still true, I, myself, would only know a few Gentlemen.
I think a few characteristics of a Gentleman is honesty with the utmost respect, bravery even brave enough to say that he is afraid, and selflessness even if it will bring humility.
Here are some fictional and real Gentlemen that I admire them very much. They have taught and inspired me to have high standards even in a day and age that does not see the Gentleman as an important characteristic.
Mr. Darcy from Pride and Prejudice
Mr. Knightly from Emma