Yep, the comment NG made about not explaining all the mysteries in the Doctor's past really resonated with me. I think this was the first episode where I really want a redux version sometime with all the bits he would have loved to include. There was definitely a sense of time and budget constraining his vision. Also (though this will be an unpopular view) I rather wish we hadn't had an adventure element and it could just have been a little meditation on this unique relationship.

It's very interesting to see a deep love that isn't based on the sexual. Though I loved Ten, I did feel that aspect of his Doctor was showcased to the exclusion of other, more original ones at times.