rcb said:one line that will always haunt me from that scene is, "I HATE YOU!" just the way he said it, and realizing how close they were. it just sucked.
And this is a fact that cannot be emphasized enough. Those three words (it just sucked) sum up that whole scene, and the entirety of the PT beautifully. ;)
As far as choking Obi-Wan being the last thing on his mind, he is taking the time to yell out "I hate you" in rage while burning to death. Seems like trying to hurting Obi-Wan's feelings would be the last thing on his mind. The darkside is suppose to make you stronger, seems like while Anakin was burning to death, filled with rage of his friends betrayal, filled with fear, knowing that death would soon take him, filled with suffering as his flesh melts off his body and his internal organs begin to cook, this guy ought to have been nearly bursting at the seams with the darkside at this moment.
Surely all that fear, uncertainty, hatred, and suffering built up inside him, he could have lashed out at Obi-Wan with an attempt to physically hurt him, rather than just shouting like a spoiled child who isn't getting his way and wants to make his daddy feel badly by saying he hates him.