I wouldnt mess with any. All could kill me before i even blink. :| tobi and sasuke would slit my throat no hesitation. I would be scared to say the wrong thing around madara, and if i aint name Sasuke, i would be looking over my shoulder for itachi's katana.
Itachi: I wouldn't want to be mind-raped nor would I want to be stuck in some weird, ethereal bottle.
Obito: The **** would I do in a dimension alone, starving to death? Admire the black cubes? Lol