I think that sometimes it's not us that chooses nitro or electric but rather our neighbours, city... etc.
I'd love to run more nitro but just don't have the time to drive out to the track or a friends place outside the city. My city has a by-law against RC vehicles in city parks but really they only enforce it when there's a complaint. I've never had a complaint with my electrics but with the nitros, as soon as I start it up I see people getting out their cell phones...