I do feel everyone is equal in value. Possibly equally worthless depending on how you view humanity's place in the overall universal timescale.
Whenever you look at someone else and think they are being arrogant or self important...likely it is time to take a step back and think about why it is OK to think that they should not feel that way. Maybe they have good reason that day to feel self important :) Take it as a good opportunity to take a good look inside and realize...overall...it doesn't matter how other people view themselves.