Both professional activities and hobbies
For example… If a new hire is introduced as “good at Python and C++” at work, what does this imply about the person’s skill level in your opinion? Or if someone says they are a “good runner”, what would come to your mind? Or is it field-dependent?
Asking because sometimes I’m not sure if I am under/over-exaggerating my own abilities when meeting new ppl at work/etc…
It’s context dependent, not field dependent. “Good at [something]” usually means it’s simply above average. In some occasions, it can mean it’s just average as opposed to terrible. In other occasions it means it’s exceptionally good.
For your specific examples I would believe they’re somewhat above average, but not impressive, unless more context indicates so.