I wish that I had something - anything - that gave me a realistic look at how games are made when I was first starting out. I remember finding the few articles, postmortems, and interviews about making games. These mostly spoke of triumph. True failures or disagreement were rarely spoke of. I had to learn the hard way.
Luckily, for anyone who is interested in joining our wonderful, weird, and sometimes frustrating industry, there is the Double Fine Adventure Documentary! Watching the entire series is absolutely worth your time. It's a fantastic look into how games really get made.