POV done well will be a natural extension of who your character is. The way they perceive their surroundings and what they notice about other people says a lot about what kind of person they are. There are other things to consider as well. The writer must also remember that the POV character is filtering everything he sees and hears through his own life experience up to the point where the book starts.
As a broad example, I think everyone will agree that a young woman will see things differently than a young man. She will notice things a man will not notice and vice versa.
The same holds true when you consider how a young woman who is a professional in her career would interact with her surroundings and others when compared to that of a young woman with no formal education.
It also stands to reason that a young woman with a past of abuse will perceive things differently than a woman who grew up secure in her parents' love.
You get the idea, I'm sure. As a reader sees the world through the eyes of the POV character, they should also be able to pick up on who that person is and what the person wants to become. No two POVs should be alike because every character is unique. This is a rule easily remembered when writing dialogue, but what about narrative? Every time you switch POV characters, the reader should know from reading the narrative whose head they are in without ever having to be told. Digging deep into who your character is and showing that through deep POV will build a connection between your reader and the character.
Things to consider as you develop your POV character:
Where they grew up
Likes and dislikes
Relationship strengths and weaknesses
Can you think of anything else to add to the list?
S. Dionne Moore is a three time Carol Award finalist and author of the LaTisha Barnhart cozy mystery series: Murder on the Ol' Bunions, Polly Dent Loses Grip and Your Goose is Cooked.