Bring in the military is alot like sex. You can read all the books, see all the movies, talk to people about it, but until you experience it you are pretty much clueless..that and you will get screwed somewhere along the line. :-)
OTHO for most people it's a positive experience, I know I learned a number of life leassons that have stood me in good stead..ie how to get along with and work with people that you have very little in common with.
Rule #1 The DI is ALWAYS right.
Rule #2 in the unlikely event that the DI is wrong...see rule #1
My TI (AF) had a slightly more extended list of rules:
1. The TI is always right
2. The airman is always wrong
3. See rule 1
4. See rule 2
5. See rules 1-4.
But I think I like yours better...
I was one of those who first enlisted at 17...we got hassled in basic because "your parents signed your life away". Heh.