Are you open about your love for Tabletop RPG's or is it a closely guarded secret maybe only a few of your friends are aware of?
I am open about it to people, but to look at me would obviously identify me as a nerd(unfashionable glasses, belt holster for phone, usually shirt or jacket depicting comic or videogame reference), so its not like hiding it would mean any difference.
Board Games: Yes. They're self contained, and if they're good, everyone likes them.
40k, MtG: (When I played them) No. MtG is more acceptable than 40k, probably, but neither of them did I let on about. It didn't seem worth it.
A normal opportunity to bring it up doesn't come up often. I don't really hide it, I just don't have a reason often to bring it up anyway, the times I do bring it up, it's around "so nerdy XD" friends that say they'd like to play tabletops or board games, but I find it hard to actually get most to commit. Some do though.
I started playing RPGs in the 80's so my friends and I were quiet about it until we were adults. Mainly because of the devil worship scare associated with D&D that some parents would swallow. Here is a classic one from 60 Minutes that made some parents fail their save vs fear roll:
I'm a grown ass man. I'm going to spend my time and money however I choose.
I don't shout it from the roof tops.
But I've had free moments at work so I'd spend some time putting together my campign in spreadsheets.
People ask wqhat Im doing and I tell them.
Turns out a few people used to play when they were younger. Others who haven't go "oh. Cool."
i've gotten away with telling a few stories about my campaigns when it comes up too.
Most people don't really care.