not your cup of tea

not (one's) cup of tea

Not something one prefers, desires, enjoys, or cares about. Thank you for the invitation, but long-distance cycling just isn't really my cup of tea. When I found out that reading wasn't his cup of tea, I knew that there wasn't much of a relationship in store between us.
See also: cup, not, of, tea

not your cup of tea

not what you like or are interested in. informal
See also: cup, not, of, tea