If someone is going to restaurants serving variations of a dish, or if they travel to cemeteries where their ancestors are buried, that's qualify as hobbies.
Whereas, if they go to all the trending restaurants or countries/cities on social networks, that's not hobbies.
In the first case, they make active decisions on what they do; in the second case, they are just following the decisions made by others.
To be clear, both are fines, as long as they feel happy with how they spend their free time and money.
But I know with who I'd like to spend some time, listening them explaining what they did in the last months.