For myself, nothing. I have to say I lead a rather mundane life.
My objection is not for myself, it's for others. I don't want reporters tracked. I don't want whistleblowers tracked. I don't want government employees to feel threatened they may lose their jobs because they have a private life. For those people to be safe we all have to be protected from government tracking.
I am acutely aware that doing so demands adversarial relationships with powers that can be concentrated, lawless, and malign. The risks faced by people challenging them are real. They deserve all the protection they can get.
Put simply, we're all in this together.
You're not private all the time. Stop pretending like you are, it just doesn't mesh with reality. I can fucking see you walk into that night club, you did that in full view of the whole world.
As it should be.
But, for the sake of argument, let's say you are perfect. You don't exceed the speed limit, you don't haul drugs. But one of your elected officials really enjoys visiting his secret girlfriend on Sunday evenings. Do you still trust him to vote objectively in every circumstance?
True, I can't see XYZ agency using their records to threaten elected officials, either. But I doubt anyone was worried that promoting an egotistical bureaucrat in the Bureau of Investigation in the early 1900s would ever lead to the reign of J. Edgar Hoover. The whole point is that these things aren't a big deal on their own -- it's the slippery slope concept that should concern you.
This is about the times when you're out on the street with everybody else. That's when you can't reasonably expect EVERYONE TO LOOK AWAY when you walk into a store, or buy a coffee or throw your trash on the ground.
It's those times when you're not private. You know, in public.