I'm 21 and about to graduate. I totally relate to this and am already trying to adopt this way living into my life.
My friends often tell me I'm being unrealistic and I'll soon realise that I need to grow up.
My plan is to work part-time when I leave university leaving myself all the time I want to work on my own projects and to socialise. That's what makes me happy, so that's how I want to spend the majority of my time.