That oddly specific thing you’re into, like trains or old maps or bugs? Keep it. Niche is where personality lives.

Specific enthusiasms are where a person stops being a type and starts being themselves. A taste for trains or old maps or beetles is useless socially and completely yours, which is exactly why it tends to get quietly shelved around people who find it strange. What gets lost in that trade is not the hobby. It is the part of you that is not a copy of anybody.

Keep the odd interest and give it an hour this week deliberately. Mention it once to somebody who does not share it. The people worth your time get more curious, not less.