Probably any of the first 5 years of my life (1995-2000.) I might not remember them much but times were simpler, I didn't have as many responsibilities, I was still living in New York, and I was just a little kid stanning for Spice Girls.
I miss 2014, because it was my last year when I didn't have to care about anything.
Now university started, I live on my own and It's a lot harder than living with your parents and only caring about school, friends and parties.