Re: Batman Begins v.s The Dark Knight Rises
I think a lot of people wanted Bane to die a noble death, like killing himself after being defeated by Batman or something. But the whole point was to NOT give him that noble death. That was part of the mission at that point anyway, to die in "the fire". Letting him die on his own terms would be something of a victory for him.
Instead he and Talia both die in very unflattering, inglorious ways, unaware that their ultimate mission will fail. Poetic justice.