it isn't my, his, etc. thing
not (really) (one's) thing
Not something one particularly enjoys or is good at. A: "Do you want to come with me to the concert this Saturday?" B: "No thanks, country isn't my thing." I'll give it a try, but car repair isn't really my thing.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
it isn’t my, his, etc. ˈthingit is not something that you really enjoy or are interested in: I’m afraid pubs and clubs aren’t really my thing. I’d prefer to go to a restaurant with a few friends.
See also: thing
Farlex Partner Idioms Dictionary © Farlex 2017