I started years ago with some low-level, but already better AKGs (can't remember the model right now), and, for the beginner, increasingly expensive in-ears for mobile purposes. The last ones I bought were UE 700, and I really loved those while they lasted. After returning them for the third time for exchange due to cable breaks, I finally decided to get something more sturdy. So I started looking around for good mid-class over-ears that wouldn't make my wallet cry (at least not too much), and finally decided on the DT 770 Pro 250 Ohm Beyerdynamics. I had them delivered to my work adress and my colleague looked at me a bit strangely when I unwrapped them with the happiness of a child at christmas, but I didn't care much, and even less so when I plugged them into my J3 ... I think I was mentally drooling a bit at that point XD ... By now they are used to me wearing them at times, so I don't get "the look" any more, and my colleague listened to them and liked them too, even though I doubt he'd buy some for himself.
As for other's reactions, I've been carrying them around wherever I go, and aside from the usual grin-to-smirk variance on public transit (you know, from "oh god that's clunky" to "yummy, I want that too!") I got mostly good reactions from my friends. One of my friends asked about them, so I put them on her head while playing "Eternal Return" from the Dragon's Dogma Soundtrack, and she almost instantly got that drooly, happy grin we know all too well. Then she wordlessly took it off and placed it on her boyfriend's head, with an even greater similar reaction. After zoning off quite a bit during the song's duration he turned to me and asked how much they cost me, I told him 130€ (which was true), and he turned to his girlfriend (who are both short on money) and just said "Where can we get 130€ from? I need those!"
At least those two certainly show promise
As for certain fandoms that are more likely to get introduced to audiophilia, I definitely agree that both anime lovers and gamers are more open to it, as both fandoms have a rather large and deep collection of truly amazing soundtracks, and I like both of them.