Help!!! how do i keep the same opacity to a vector shape using pen tool in cs6

I have been using the pen tool for more than 2 years already, but when I started using CS6, I have lots of difficulties using the pen tool.

I use the pen tool for vector portraits and I need to use opacity 8 for every vector. But when I add another shape on top of it, it gets back to 100% opacity, so I have to change it to opacity 10 again. This has caused me to spend a lot of time on something else than trying to make my work quick and fast. Any ideas?