i'd definately want to be a vampire!!
im not sure who id want to change me.. someone with control who wouldnt end up killing me... like Carlisle or Edward. i dont think i could handle anyone else changing me because it seems that they dont have as much control. ie. Rosalie in breaking dawn...
it would definately have to be Carlisle or Edward. they both have the control although i think on a personal level, Edward would struggle with turning a human into a vampire even more than Carlisle would.. despite my love for Edward, i couldnt put him through that in order for me to become a vampire.
so i guess it would be Carlisle... due to the control he has over his vampirism and because he would probably struggle the least with the concept of turning a human into a vampire. despite the fact that its what i would want.