I actually cried reading this if I were the girl in the story I would die if that happened this show was my escape from my life and it brought me so many tears of happiness and joy. This just shows how much fandoms mean to people
As a response to 10 was holding it in so he could see all his companions again as himself and could do no longer when he reached the TARDIS. The build up of energy made it explode out of him whereas with 9 he just let it happen.
We only got to see Team Tardis in 3 episodes, and all I want is an entire season of "into time and space!" Instead I imagine the 6 months of adventure they had after leaving World War II and heading to the Cardiff rift to soak up energy.