Re: All the Doctors in one.
It seems reasonable that the more traumatic the death, the less control over the regeneration they would have. A Time Lord who decides they're simply getting too old and it is time to regenerate can probably put time and effort into guiding it(Casually shifting from body to body before settling on one), whereas a death by any more immediate means would be far more limiting(focus on a dress size), or uncontrollable at all (I'm a girl!?!)
"There is no reason why good cannot triumph as often as evil. The triumph of anything is a matter of organization. If there are such things as angels, I hope that they are organized along the lines of the Maffia." - Winston Niles Rumfoord.