13 to 16 miserable.
My parents got divorced, my dad dangled a perfect life of ponies and fun in the countryside but I could not hack living with my sister (who had ADHD and a nasty violent streak) and a man who was using the bottle as a comforter and had no idea how to raise teenage girls so I moved in with my alcoholic mother.
Spent my time avoiding school, stealing ciggies, stealing money, being as bad as I could be as no one believed I was worth anything anyway and all the adults in my life constantly telling me I should look after my mum as she was having a hard time. I remember doing my own shopping with the child allowance, if i wasnt out the door of the supermarket in exactly 20 minutes or less she would drive off and leave me to walk the seven miles home, and she did do that several times.
16 + college away from home, riding horses, shagging boys, smoking weed and living on the scraps from teh canteen as the aforementioned alcoholic mother never put money on my meal card and my father who lived a few miles away said I was my mothers responsibility.
18 - moved away with friends, fell out with friends, slept with many unsuitable people and took unsuitable substances, had some great times, had some shitty times, moved back, ended up in a homeless shelter for youngpeople, got a council flat, realised i was suffering serious depression, spent the next 5 years trying to not die.
Fun, it was not.. but there were good times and there were stupid times and it didn't kill me :)