Aaah, I see what you mean. Hmm, well, depending on how you look at it, I feel like Eleven is the most emotionally effectible. True, Nine and Ten where also emotional, but they never really let it get them down for long. They just sort of shoved it down and swallowed it. Eleven, it looks like, is the regeneration that doesn’t react well emotionally, or finally can’t just push it away anymore. If I had to guess, I’d say it was a part of his brooding process. He’s changed his clothes, and changed the Tardis maybe because traveling wasn’t enough anymore; and he even stopped that. It took a big push for him to travel and find a companion again, and also we don’t know how long it’s been since Amy and Rory, or even River. What do you think?