1
general::
Phrase(s): have a penchant for doing something
to have a taste, desire, or inclination for doing something. • John has a penchant for eating fattening foods. • Ann has a penchant for buying clothes.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Have a tendency or taste for. For example, He has a penchant for saying the wrong thing, or She has a strong penchant for baroque music. [Second half of 1600s]
American Heritage Idioms