How do you choose a birthplan

Am trying to figure out what kind of birth I want. Before I got pregnant, I didn't want to feel pain. Epidural as fast as I could. Or I have an elective csection. So I don't feel labour. Now after getting pregnant and watching a few birth classes, I feel like maybe, natural intervention free ain't such a bad idea. I love the idea of healing fast. So have decided C-section in case of any problem. Mamas who have gone natural all through, or plan to, how painful is it? What are the advantages and disadvantages. What about epidural.

At first I thought I shouldn't write a birth plan because labour is unpredictable but I thought maybe to write a few suggestions which I will keep very flexible. But don't know what kind of birth I really want.