Yeah, I see not offering it up unless asked. I don't think that means you're 'uncomfortable'. I, very often, do not offer it up unless asked.
I feel like it's like any other topic, in that you need to really gauge the situation and decide how comfortable you are with that person, how comfortable they will be with you, and what your interests/ideas are. Even for mundane things, like shoe shopping, it's the same. Some people I'll talk about shoes with, other people wouldn't want to talk about that. Shoes, god, what's the difference?
