That's the problem with categorization (on computers, not so much our brains)
Categories can fit in and outside of each other, so that's why I said less is more. Always remember when categorizing, are you sorting for yourself or others, in other words, don't be too perfectionist on it, remember it's not perfect even after a lot of thought (think about different languages).
I was trying to think of a better 3rd category, because I had a feeling you wouldn't like 'Uncategorized' (maybe Miscellaneous or Misc.?), but decided that fits tightly, you can then just tag posts/pages with keywords/tags like "random, fun, etc." that you categorize as 'Uncategorized'
When you have just the 3, Personal, Pro, and Uncategorized/Misc, I think it's perfect. You don't want to get too caried away categorizing everything.
If that feels too minimal or "funless", don't worry, you can let loose with your tags/keywords, even posts/pages in different categories can have the same tags/keywords.