Spent my teenage years on it as well, I was a little cheater but got nowhere except just recently when I strived to make characters 180. Wish I had done better, that is my only regret. I used to play the game from the time I woke up to the time I went to bed, most of the time I was just dicking around unfortunately.
I did wake myself up in the middle of sleeping to do 15rs and such, I remember waking up tired as poop, hardly able to open my eyes and my friend Sam did 15rs with me! And occasionally I would do the same as Kev, but with having over 30 accounts (seriously, this game has too much stuff, not enough space) I would just leave one to fish/farm/what have you.
My mother and step dad got into the game as well, we even moved to Capri together for a little while.
The only difference between when I was playing and when I quit was... nothing! I'm still a lazy piece of poop! I hardly play games now even though I have millions of them!
Built a gaming computer though, just waiting on graphics card and hoping ESO rids the monthly fee so I can no-life that.