It's a problem when you are passionate about something, when others aren't. Whether you are collecting stamps, building model railway sets in your basement or obsessed with watching birds (aren't we all!), then it's hard to share the enthusiasm with people who just cannot see the point.
There are petrol-heads who will find interest in nothing but talking about coal power plants and vehicle fires, although we all know that those are not an issue at all.
Then there are people who just don't care, they just want transport from A to B the cheapest way, or the safest or as long as the car has a nice color.
I usually just mention the car lightly. If people start ask questions, or even lighten up with a "wow!" then I am happy to tell them about it. If there is no specific response, I talk about anything else (if anything at all).
I am obsessed with solar energy (mainly thermal, not as much PV), and I am to some degree obsessed with how far I can take it to make an old house almost self sufficient in space heating, water heating, air conditioning, electricity and water use (rain water). It's not about how much money I can make, it's about how little fossil fuel and water can I resort to using. As soon at there is no good investment in it, most people sign off - not interested. Being a personal demonstration project, an extreme hobby you could say, I am posting money and time into this like there was not tomorrow (and maybe there isn't, some day, if we keep burning everything we get out hands on).
Don't waste yours or other peoples time to convey a story that they don't want to hear.
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Sounds normal to me. I'm exactly the same way. With the exception that I've made an effort to not "annoy" folks that don't care about it. If they ask I let them have it. If they don't I talk about other things. It HAS been an effort though.
See, that is my problem.
Al says the same as me in a line and a half, and conveys the same message basically. Brevity. Out.