Hypnosis wont really do anything your not capable of or isn't in some way a part of you already in some way.
Like, if your looking up gay hypnosis to make yourself liking you probably already like dick in some fashion, otherwise you wouldn't listen to the file. Like people are saying just use moderation and if you come across something that really gets to you maybe lay off it for a little while, I've definitely run into stuff like that.
Short term you dont really see any changes in how you think, like were talking first year or two, but if you do it for more than 5 years you'll definitely notice that you are not were you first began in terms of where you mind is at sexually, but thats not necessarily unique to hypnosis. As far as the tranny shit goes, dont act on anything that you start feeling after listening to hypno, only start thinking about it seriously if you have for your entire life, shit is not stuff to fuck around with.