the point of the poster thing... ehhh. it seemed like a good idea at the time... the character is sick of acting like a kid and failing at adult things. so, he thinks taking down a childhood poster will do the trick... after he VERY IMMATURELY gives it the finger. contradictary behavior.

despite his frustration and desire to grow up he still acts like a punk. so, almost everything serves that point. he wants to do well and come up, but he does a lousy job on tying the tie, gives a star wars poster the finger, he misses when throwing the money into the toll booth, he shows up at the building empty handed, he acts like a baby when he doesn't get the job. he's got growing up to do. see now?