slow's guide to women:
Everything in moderation. If you live in a dorm, the poster could come in handy. When I was in college we left our dorm room doors open so people could walk by and say "hi". If a chick walks by and has a half second to assess what you are into and you have a yoshi poster they may stop. If they hear a song they like, they may stop. One may think "chicks dig this yoshi poster, so I should cover my walls in video game stuff", but they are mistaken. The more video games or Anime items you have, the larger and uglier the women will get. The amount of women who are interested in you will go down as well.
I'm pretty sure having a N64 within sight is the solution, but one poster may be acceptable. Personally if I were younger I would have a N64 with 4 controllers and mario kart running 24-7 on mute while playing a mix of Imagine Dragons and The Neighbourhood (both bands inexplicably loved by women). I would befriend the fat chick because odds are she has 3 good looking friends (and she is the ace in the hole if you strike out everywhere else). These steps will insure a constant influx of women and establish you as a fun/sensitive guy. If you want the trifecta you should also have a visible tattoo or body modification to show you have "an edge".
These steps should help you get some action (hopefully not only by the fat chick).
You've put a lot of though into this. Lol.
But what you wrote is all true (unfortunately). My wife hates all my gaming stuff, so I've been cutting back on all my things. Thank god for digital games, dont clutter the house, so out of sight, out of mind for her at least.
But before I got married, I did exactly like you stated, and didn't have much luck, then after college, I decided

it, be myself, blahblahblah. And as dumb as that sounds, she accepted I was a huge geek and gamer, and she doesn't even watch tv, at all, ever (doesn't even know what Star Wars or even what a zombie are). Works great.
In college, it feels guys gotta bend to what women see as acceptable. As you grow older, it changes, and they tend to be more acccepting or geekier stuff, since they see it in mainstream movies and shows. Not the norm, but it does happen more.
Either way, cane here to see the new N rewards, didn't expect this topic. Lol