If you love coding and - as it appears from the post - are working on your personal projects, this seems like a reasonable schedule. I definitely wouldn't want

If you love coding and - as it appears from the post - are working on your personal projects, this seems like a reasonable schedule. I definitely wouldn't want to work that much for an employer - I've done that when I was around your age and younger, and it's pointless. In the long run, you might want to set aside 3-4 hrs/week on some real physical activity though - walking is fine but you need upper body strength too. In any case, once you have a partner and/or kids in your life, you'll find you won't be able to spend this much time on coding, so enjoy it while it lasts!