i probably under-analyse people, if anything. i'm an incredibly private person, and i extend that to others - i figure if someone is not telling me the 100% truth (or being 100% open, or whatever), then they probably have good reason for it, and i let it go.

but i think the other thing that i rely on is that i've always been the 'go to' person, so if people are wanting to be open, i'm typically the first person to find out.