While genderswap stuff (gender bender originally, it's really only with japanese stuff that I see gender bender having a different meaning) usually makes illogical situations to have a character completely change sexes, my least favorite premise are usually what the guy said (can't remember its shortening). It's even more illogical usually than having aliens steal a character and change his sex for an example. But still yet, genderswap stuff are kinda like a guilty pleasure for me, it's not like I ever talk about it or even care most of the time, but when I do find it and it's good, I love it. Though, I think many of them stop after they go through the typical genderswap tropes.