Give me a break! A perfectly appropriate thread. OP would like some input on what others are finding to be the best setting for brightness. Whats wrong with that?
If you don't like it, don't read it or respond to it, but there is no need to flame the guy.
To the OP. I have found 30% works the best for me. It gives me good battery life and is still plenty bright.
I put mine at 10 in a movie theater a few days ago and didn't think about it till now. 10 works just fine! And I didn't realize why the battery was lasting longer.