"As a writer, your job is to identify the emotion your character is feeling, understand its origin, and imbibe the feeling yourself." -James Scott Bell
I think it is important to add your own feelings and emotions into your characters, and likewise you should add interactions with characters who are similar to your friends and family.
My main character Gruff is me before I found people who truly understand me. His siblings represent my siblings who love him, but don't understand him. And Master, represents my mother, who wanted to understand me and put effort to do so, but never fully got there.
On the flip side my second lead, Mel is me after I met my people. She is outgoing and excited about new experiences. She has people she loves and would do anything to protect them. I feel that same way when I am with my friends.
Understanding yourself, leads to characters who are leaps and bounds more interesting.
Not trying to call you out BoomerZ, just saying that you should be more open to exploring this option. I am still exploring it, and it's not always easy, but it's tons of fun.
The quote I used at the beginning of this post is from a book called Writing Unforgettable Characters by James Scott Bell__