Clara Oswald’s normal, everyday life — here meaning her biological family (Mum, Dad, Gran, Linda), her quasi-adopted family (Angie, Artie, and Mr Maitland), or her job as a teacher — has been a part of 70% of her episodes so far. Not always a major part, but there is a continual commitment to showing her roots, that travelling with the Doctor is an addition to her normal life and not the whole of her life.
When people say Clara has no characterisation and her whole existence revolves around the Doctor, I honestly wonder if they’re watching the same show as me.