If I had a website about programming and it had a forum part is it purely personal? What if is it just comment section? What if I had ads to cover server costs vs when I don't have them now? I closed the website because I don't know. And I don't think I would say I know until I hire a lawyer.

Re analytics part from another comment, I only care how they interact with my website. Without sharing that info with anybody. You could avoid cookies if you really wanted to but then you actually collect more data about your visitors.