Yeah, seems your really skilled at getting lucid at this stage. But it seems you haven't utilized the lucidity to all that is possible, you didn't really mention any particular 'achievements' of yours in your dreams except getting away from nightmares. Flying and underwater breathing are quite basic things I would say.
Mostly I would say your success is to your early start to begin your 'training'. It can take years for to fully develop these dream skills. Having a early start is a good thing.

Myself I didn't really start to remember and recall my dreams until the age of 15-16. Before that I had no real memory of ever seeing into my dreams. It did take a while before I had my first lucid. Which I didn't know the name for back then and it slowly has been progressing as I have aged. It's slow but steady progress. I learned the name lucid about a year back now since then I've only become more focused to try and improve my dream time with more lucidity. I'm 23 now.
At all times otherwise I've been passively on and off been working on my dream recall since age 16 but that was just being mindful about it and looking back and trying to recall. As of late as I joined these forums I started my dream journal. It has been of help as well to propel me further onward.
But I have to say it's slow progress in ways anyway.