I have all the hobbies (thanks ADHD), so it depends on how much I want to avoid the conversation. Usually "computers" is enough to signal "danger, she's a nerd".
Otherwise it depends on what the other person might find interesting. Gardening, clay pigeon shooting, piano, mathematics, baking, and amateur radio are all fun topics I can infodump on.
I have all the hobbies (thanks ADHD), so it depends on how much I want to avoid the conversation. Usually "computers" is enough to signal "danger, she's a nerd".
Otherwise it depends on what the other person might find interesting. Gardening, clay pigeon shooting, piano, mathematics, baking, and amateur radio are all fun topics I can infodump on.
I really am a nerd.