( aren't they just so cute??)

I don't know if it's just me, but when I write fanfics, no matter how different the main character is compared to me in real life, I always put a piece of me in her character. Some events in the fics actually did occurred and some characters in the fic are actually based upon real people in life. Of course, I'm not saying my fics are exact replicas of my life. I'm just wondering..Has anyone ever based a character off of yourself or people around you? 

If you have any tip on developing characteristics of characters, pls let me know and thank you for your time! ^-^