A complete frontal lobe lobotomy? You're giving me the choice between death and death, with one just being a massive burden for my family. Once you're frontal lobe is disconnected there is no you. You're concious, but since you're temporal lobes don't do anything , you have no short term memory (and I mean, non, you couldn't do anything independently), you have no drive to do anything (you will let yourself dehydrate to death), you have no free will, you are personality devoid, you have no past, no future, and the present is perpetual avolition, anhedonia and without value. It's no existence, it's always better to choose death.
Of course, you don't necessarily have to have your entire frontal lobe disconnected, but I just assume this is what they're going to do, when faced with such a stark choice. The other forms are not really much use in this kind of scenario, they're too unpredictable to produce a personality change that's directed.
So yeah, death. There would be nothing left to live for.