Never embarrassed.
I am a motorcycle riding, fireman. My fragile masculinity need not worry.
In saying that, I play "childish" games like Minecraft to escape reality or from a bad day/job... Back in the 90's it was common for video games to be frowned upon, heck computers and technology was frowned upon in general... Today it's absolutely acceptable.
If you enjoy a game, then that game is working as intended and providing entertainment. So enjoy it.
If other gamers see that I have an achievement/trophy to said "childish" game, then they obviously had the free time to check, if they don't agree with it, then that is their problem to be fair.
--::{PC Gaming Master Race}::--