I still don’t know what I want to be when I grow up and I am over the hill. I think the question of what you want to be in 5 or 10 years during interviews is a silly question. My mentality is to find a job you love or an awesome company, work for good people and work hard and your job will be fulfilling.
Just surround yourself with people you like to be around and your job satisfaction will be much better. Just my opinion.