For example, you might say:
* "He's an aficionado of classic cars."
* "She's a true aficionado of fine wine."
* "I'm an aficionado of historical fiction."
The word "aficionado" implies a deep knowledge and appreciation for the subject, as well as a strong interest in learning more about it. It's often used to describe people who are knowledgeable about and enjoy things that are considered sophisticated or niche.