If I find bugs...I normally do not. Even RC kernels are stable..When it comes to beta-testing, you are brave. I would never test a RC kernel on my system. As many people say, "Somebody needs to do it". Do you submit bug reports to the Linux developers via GitHub? If not, you should.
Yeah, my kernels are not slimmed down. Definitely need to though. I setup my kernel for my wifi, and have not spent the time to slim the kernel. I think I will try to make a slim 3.12-rc1. As long as I have a stable kernel for school I don't mind having numerous testing kernels.