I do a half assed PCT and it works fine for me. My last bulking cycle:
1000mg Sustanon /week
500mg Deca /week
Some frontloading with Dbol
My PCT was injecting HCG for a week and a half. No problems.
I've only used a "full" PCT once and it was because I had 6 things in the cycle. But I'd be personally (the way my body has reacted), to using no PCT depending on the cycle.