I wish I saved my money when I made it. Looking back, I suck. :( But I had fun.
Went back to 9-5 about 2 years ago. Adsense is now just a small bonus each month. Granted, I no longer work on the sites they just generate what they do.
Lack of motivation after working 9 to 5 to build them back up to the glory days. Doubt those days could be returned even if I did re-focus on them.
Welcome back to the daily grind. :D