I just like everything, so it's all good
It's just if you think about Rose's arc, the doctor basically grabs her as a companion for no real reason, shows her incredible things, and then falls in love with her. And she's so important, they have to cripple the next companion's character just to make the point of how important Rose is. As a UK person, I had every reason to get 'meh' at Rose since she was played by teen pop person Billy, but she was great in the roll so I was instantly ok with it, and Rose's arc. It's just when I've heard Rover or Amy being called Mary Sues, I look back and go 'why are they if...'
I really liked the end of the 10th doctor, even if the first part of that two parter was pretty weak. It's good to re-invest the regeneration with some cost. The Eccleston -> Tennant regernation looked like nothing, and the only reason it went a little wrong was because of the vortex stuff.
It's like 'meh, sure, he can save the world and get killed, no biggie'
It's nice to know that the doctor can feel like it's dying, especially since it would be a logical echo to those watching the series. I think the more he regenerates, probably the more experience he's had with exactly what he loses withit.