I know I am not a top dog when it comes to Star Wars collecting. However, my collection is quite large. Mine mainly consists of the action figures and 12inch from vintage up through now and the vehicles, ships, playsets that go along with the lines. I do have a lot of carded stuff as well but mainly from 1995 on.
I stay away from the prop replicas, store displays, PVC figurines, and extra stuff like that. Yet, I have many things in the collection that are not toy-related. If I go to collectible shows and such I usually act like the other person knows more than me, but usually I know exactly what is going on and can see through the bull.
My only major collecting mistake was not sitting in line for a Jorg Sacul at Celebration 2 and actually having fun at the booths and such. That and trying not to get trampled by the large crowd