I'd have to say Kanon(first vn), or just about any key vnovel affected me alot. Dem feels tho. But because of kanon i discovered i was a lolicon haha. I spent a week or so in denial of that until a friend of mine pointed out some things, ultimately i became ok with it so long as it dosent transfer over to real life, lol. It's kind of a strange thing that in my 20's i'm still discovering stuff about myself.