I Just Love to Think..and as long as it's not way too much it does have some positive side effects.
Sometimes these thoughts help me at school. (very rare though)
But thinking before doing something is something very positive in my opinion.
I've never been a fan of temper tantrums so I plan like everything before doing it.
And as long as the thinking is not combined with being shy or thinking way too much it's a good thing.
Thinking is enlarging your personality. You get new insights in your personality. It lets you see yourself from various points of view. It lets you grow in ideas, which leads to a grow in creativity.
Of course not all thoughts do this, but some of the thoughts I have "too much" are good ones for sure.
I think every good writer or musician had a few thoughts too much.
Otherwise they wouldn't have been able to do such great and thoughtful and creative things.