Apart from obviously playing a lot of games, I also listen to a whole lot of games-related podcast, and watch games-related videos. Podcasts such as Cane and Rinse, the Giant Bombcast, Midnight Resistance. Also stuff like the TOVG podcast and the Jimquisition podcast. I'm a big fan of Chet and Jon's Reassuringly Finite Playlist too, although sadly they lived up to their name and ended the show recently.
In terms of videos it's stuff like Extra Credits, Super Bunnyhop, the Jimquisition, and MrBtoungue. So not really Let's Plays, although sometimes I'll watch one if it comes from someone who I already like, but usually I like more informative and engaging stuff. I also watch some car stuff too like Maiham Media, Mighty Car Mods, and XCAR.
Sometimes I watch the odd bit of anime too. I don't usually find myself being drawn to series that are massively long, so usually it's only films or short stuff. I'm a massive Ghibli fan, but I also really like stuff like Ghost in the Shell, Ergo Proxy, FLCL, and of course Initial D. Also a huge Avatar fan (as in TLA and Korra), if that counts.