I would like a doctor thats tall and muscular for a change. I imagine a scene like this: With his last breath he mutters "If only I had been stronger...I could have protected everyone"...-> regenerates into 2 m 10, muscular guy ;-)
Interesting! Then, instead of getting something like the First Doctor's classic speech:
"One day, I shall come back. Yes, I shall come back. Until then, there must be no regrets, no tears, no anxieties. Just go forward in all your beliefs and prove to me that I am not mistaken in mine."
We might simply get:
"I'll be back."