Why do you care about privacy?

I'm following several privacy focused communities. Mostly as lurker but in few I'm more active. Every time I see a posts like "how to be more private", I wonder about the reasons behind those questions. What's the reason you want to remain private (don't confuse it with being anonymous)? Could you elaborate on your reasons?

Let me start.

I worked (and still working) in a highly regulated industry as a software/devops engineer. I've been working with banks, insurance companies, global online payment companies, major credit card vendors, few global corporations. I have seen how data is gathered and (mis)used. Every time someone tells me "I'm sorry but the system..." I know it's the data gathered by the "system" and my profile created based on that data was the reason for "but". This is why I care about the privacy, to prevent companies from taking advantage of my current situation and charge me more.