Hmm. 12 years of school at 25-30 hours a week, an average of 14 weeks off a year, sick days that no one really yells at you for, a very social atmosphere, getting away with being irresponsible, varied days (learning is fun when you think about it) with not as much routine as you may think yet, no 'boss' type figure who likely slept their way to their position or got their by palming work off to everyone else and appearing as a good 'delegator' or management material when infact they are just plain bone idle lazy, all responsibility you have and may fail to meet is yours alone; entire departments dont have a shit attack if things fall apart as they invariably do.
Versus:
40 odd years of a minimum 40 hours a week, 4 weeks paid leave per year, having to simply put up with an unworkable team environment because colleagues all have different goals and reasons for being there, trying to get a team working when there are workload clashes and those that do not add to a team environment's success, 1 yearly pay review where all the mistakes are remembered yet all those millions of good things you have achieved are forgotten in such a convenient way, pay that is not likely to reflect your work; most workers are tired and pissed with the fact they have to do on average the work of 2 people (unless you are very lucky), a wage that is supposed to cover rent/mortgage, all bills, petrol, food, rates, loans, unexpected expenses, and hopefully a bit is left over so you can try to pretend you have a life.
I would go back to school. Of course, if I did, I would not be happy after a while and wish I had money and a job so I could go out and live like I would want. And end up just in some grind with endless bills, working with a problem filled company that cannot even get a server running smoothly....etc. lol. We cant win no matter what we do.
Good luck with your new school U2er, I hope you settle in really quick and the people are friendly.