Tivo Roamio
Tivo Mini
Roku 2XD
Apple TV 3rd Gen
Xbox One
PS4
Smart TV
The Tivo Roamio and Tivo Mini are used the vast majority of the time since they are the only devices on that list that output 24Hz streaming media at 24Hz. Most content on Blu-ray, Netflix, and Amazon is in 24Hz but the rest of my streamers convert this to 60Hz before outputting to my TV. This causes lots of screen judder on shots that pan from side to side and when it is really bad it makes me a little motion sick. I use the Tivos for all of my Netflix, Amazon, MLB.tv, Hulu Plus, and Youtube streaming.
I use the Xbox One in the living room and Roku in the bedroom for apps that aren't available on Tivo. These are used for the HBO, Showtime, Starz, and Twitch apps mostly but I use those services much less frequently than the ones that are available on Tivo.
The Apple TV has been moved to our summer cabin on the lake. We have internet but no TV there so we use it for Netflix, iTunes PPV rentals, MLB.tv, WatchESPN and occasionally use it to airplay my the Dish Anywhere app from my parents hopper from an iPad for live tv that isn't otherwise available there.