[gesman]

If you think conversation is not going to the direction you enjoy - you may leverage something between ignoring silence up to firm "I am not interested in this conversation" to curb someone's unsolicited enthusiasm.

On a side note - last time i took Lyft - I had very pleasant conversation with lady who is also part time art teacher and artist.

It also fun to exchange passions - but of course - as long as it's mutually enjoyable.