Not somebody’s cup of tea
Definition 1 of 1
Pro Tip 1/3Subjective Taste
Indicates a personal preference or taste that differs from others. 
Soccer is popular, but it's not my cup of tea.
Pro Tip 2/3Polite Refusal
A gentle, polite way to say you don't enjoy something without offending others. 
Thanks for the invite, but opera is not really my cup of tea.
Pro Tip 3/3Not Interested
Expresses a lack of interest in participating in a certain activity. 
They're playing chess, but it's not my cup of tea.