re: GoT - discussion on Cersei's inevitable demise (some spoilers)

Forget the prophecies, it just makes for a better story if Jamie kills her IMO. Their actions for better or worse have been tied togeather for the entire series.

Jamie, for all his worrying about his legacy, will go down as a kingslayer, queenslayer and kinslayer. Everyone in the realm won't understand that he did it all for them, he will have saved thousands of lives by killing his sister and the mad king but forever have his name will be mud.

Tyrion killing her would be satisfying but fairly unimpactful sense he is already a kinslayer. He is already a shitstain on the family name, killing her would just improve that rep. Him owning the Rock will be revenge enough for him.