How tall are you?
I think in terms of bodybuilding, you should concentrate on these areas:
* quads
* rear delts
* chest
This is one of my friends who is your weight. However, I think he is only 160-165cm tall and around your weight. I don't know if you get guys in your comp looking like this guy, but should give you a target for areas to improve... like this guy's chest is so big it looks like double D tits.
Neverthless, keep going... keep improving... let us know how your progressing. I'm keen to know. Thanks.