To the fearful it is threatening because it means that things may get worse.It has a considerable psychological impact on the human mind.To the hopeful it is encouraging because things may get better. To the confident it is inspiring because the challenge exists to make things better.
If I deal with people that aren't nice to me, I give them just as much attention that they deserve. If it is work, I keep the conversation to work related things, I will say "Hi" when spoken to, but I avoid personal or chatting situations. At play, I ignore the people, and only speak if spoken to.

It really depends on "Who You Want To Be". Others see how you relate to people, what type of person do you want them to see. You have to look at yourself in the mirror each morning. Act in ways that make you proud to see your reflection. Most importantly, follow your heart. If you are overly nice to someone, and allowing yourself to be lessened by that person, your are not doing your self-esteem any favor. I try not to let my upset at others encourage me to lower to their level. By treating them without anger and rudeness, I maintain my integrity. By walking away when I do not want to deal with them, they know that I do not appreciate their behavior.

hope, it will help u,
take care
Richard:)

I am the same way, most of the time.  I think for me it stems from years and years in the restaurant business where "the customer is always right".  My way of dealing with people who are not nice to me is to "kill them with kindness" -- I really go over board (very obviously so) w/niceness to people who are mean.  What it ends up doing is making them look really stupid, sometimes even making them feel really stupid (but not always), and i can walk away and know that i am still a nice person, i didn't have to insult or offend anyone to prove anything!