Writing Journey: Evolution of a Word Nerd

TODAY IS READER QUESTION TIME:
Alexes from One Cluttered Brain asked me several all at once, and they're all sort of related, so I'm answering them together:
When did this fascination with grammar and words begin? Does it interfere much when you write something? And aren't you an editor as well? How does that work when you are trying your writing hat on? Does your editing hat ever get in the way?

Being as I grew up with a linguist as a father, conversations about words were typical dinner-table...