I used to own a Nexus One. It sold 135k initially and never saw anyone in public use it. It was as rare to me like my old Atari Jaguar. I never knew anyone or saw anyone own it except for people selling it online or on YouTube videos.
I've seen maybe 4-5 people in public own HTC One M7. Never M8 as it never sold here. I've seen maybe 2 people here own Xiaomi Mi 3 and both times at the mall. Maybe if I visited China, I would see more of it as it did sell like over 10M. I like that when I bring it back to US, nobody will really have it just like Asus Zenfone 5 and many ones sold only in Asia. HTC One M7 or M8 would be more common in US and even that isn't common like iPhones and Samsungs.
One of the most common I see in Manila actually comes from SONY Xperias. That's rare in US but quite popular in the Philippines along with Lenovo and locals brands like Cherry Mobile and MyPhone. Asus is on the rise too since they offer better value than most.