Shoujo - because most of them have weak helpless female characters (not all, there are a few I like)
ecchi and reverse harem. Idk? I just don't like it that much.
I used to like harem and reverse harem manga/anime but not so much anymore. I feel like they're pretty cliche and don't have substance in plot. I still like a few, though I'm not really trying new ones.
Usually I tell my friends that my favorite is shounen... But I'm a rotten boy who reads yaoi everyday lmao
Also, "slice of life" can easily bore me to death, so I try to stay away from those. But there are a few of them that I find enjoyable (most were recommended by friends). Actually, kind of the opposite of harem, I used to really hate "slice of life", but I'm slowly and gradually getting more into it, probably because I'm getting older lol. Tbh I don't really understand the genre all that much.
I hate shoujo mangas so much even though I was in love with them a few years ago. The girls usually always got on my nerves for 1) just having an annoying personality; 2) picking the asshole guy when the other dude was CLEARLY the better option; and 3) doing really cliche things like falling or acting like a fool in front of her crush
What's your least favorite manga genre? Mine is shounen, I used to love it but I guess I'm too old for it now. Seinen and josei mangas with deeper plots entertains me more now days.