I usually have mine at half. When I'm at work browsing MR instead of working (like now!) then I typically turn it down further so that people can't see what I'm doing 
I adjust it as necessary though; for example I'll turn it up when watching a video, but most of the time I keep it sitting at halfway or below.
I adjust it as necessary though; for example I'll turn it up when watching a video, but most of the time I keep it sitting at halfway or below.