It seems like the line separating these two is becoming thinner and thinner as time passes. I've noticed sometimes even doing things such as holding the door open for someone pins me as a nice guy. * I'm 22 years old and I'm very mannered when talking to other people that aren't my friends, I would say: please, thank you, sir, ma'am, etc. Am I too old fashioned for my age or just being a gentlemen isn't what it used to be anymore? Or maybe I am being a nice guy and I really don't understand the difference between a nice guy and gentlemen? *Note: A lot of the times I've noticed when I little things such as holding the door open for women, generally older women would acknowledge me and say 'thank you' or smile while younger just walks by without any acknowledgment at all, like I'm not even there. I'm mainly looking to see what do people consider a nice guy and a gentlemen, if there is a separation between the two anymore.