By far I got the most fun, entertainment, and overall usage out of my PS3. Like 95% of all the video games I've played in the last seven years has been on my PS3. So that would have to be my favorite.

Actually, come to think of it, the vast majority of media I've consumed over that time was via my PS3. I still use it to watch most movies/tv shows, as it makes for a superior media center to both the Wii U and the PS4 and my cable provider at the moment.