I agree with @Kevin.Herron on generally going to the newest version--with the caveat that I tend to wait a few days to see if any issues that would affect us come up in the forum (of course this doesn't work if everyone does it 
).
A couple other things you may need to consider are noted in this short thread:
In our case, we're on 8.1.9 and waiting for 8.1.13 for the next upgrade due to the issue with default tag provider assumed in many paths on older projects and no urgent need for anything in 8.1.10-8.1.12.