one’s bag

(one's) bag

slang Something one particularly prefers, desires, enjoys, or cares about. Often used in negative constructions. Thank you for the invitation, but long-distance cycling just isn't really my bag. I knew classic literature was your bag, so I thought you might like this book I found.
See also: bag
Farlex Dictionary of Idioms.

one’s bag

n. one’s preferences; one’s talents. Hey, Tom, what’s your bag? What do you like to do?
See also: bag
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • (one's) bag
  • bag
  • anytime soon
  • a month of Sundays
  • perceive
  • perceive (someone or something) as (something)
  • perceive as
  • have it both ways
  • preclude (someone or something) from (something)