>>9408397 If You were given a Chance to Live and be in a Anime any anime you choose which would it be? BUT HERES THE CATCH! You are the Opposite Gender for the whole Series
That is not enough information for an answer.
If I was the opposite gender, would that also mean that I'd be grown into it or altered psychologically thus that I could be attracted to boys.
If not, that'd just feel gay and uncomfortable, so the options would be to either drop it or go for series with lesbians. Unfortunately, I don't know too many nice series with lesbians that don't involve some kind of horrific death or other nasty stuff, such as Mai-HiME.
If the deal would include psychological alteration, Chokotto Sister. Insane fun to be had. Also incest.