Funny story about the whole tucked/untucked thing.
My office VP is a big stickler when it comes to this issue, he hates untucked shirts. We have a business casual office, so guys frequently wear a golf shirt, sometimes untucked, including myself most of the time. I go by length of the shirt to determine if it's tuck-able or not, some golf shirts simply aren't tuck-able.
So anyway, after much complaining on his part, he actually wanted to have me written up for wearing an untucked shirt.
So I reviewed our dress policy with HR and confirmed that tucking your shirt was nowhere to be found in there. He had to back off. He still gives me a dirty look now and then. What a maroon.