Sort of, but not really, and here's why. You can start with someone that you know but as soon as you put that character into a fictional situation they immediately grow new dimensions and become someone else. They have a life of their own. I don't think it's possible to write a character who reflects someone that you know or yourself. Who reflects them accurately.
Characters are very much like human beings.
They are shaped by the experiences in their lives and they grow from a kind of infancy on page one to adulthood by the end of the book. On a normal day, Mike gets up about 6 AM and starts writing. Which is about 10. If the hired guy has the day off I check the fences and the buffalo water, sit with my laptop in an orgy of intimacy with words. Mike and I have breakfast together and talk about thought and characterization and buffalo.