Well, this is kind of obvious but video games. Personally, I see video games as the ultimate art form, especially when done right. What you get from paintings, books, and even music, can all be found within a video game. You get beautiful visuals, you get story, and you get music all in motion. The same can be found in television and movies, but what really makes video games that much more special is the interactivity. I'm not just watching, I'm controlling, connecting, experiencing. It's an amazing mix. But not all games capture this side of the medium. Sometimes, games are just meant to be fun, nothing more. There are only very few games that truly leave me mesmerized. Games like Super Mario Galaxy, The Legend of Zelda: The Wind Waker, Resident Evil REmake, Alan Wake, Gears of War, and Halo 4. My taste varies, but usually I'm more into the dark gritty kind of visuals, but I can appreciate the bright colorful worlds of Super Mario Galaxy, Wind Waker, and Halo.
Other than games, I guess my only other top art forms include animation and music. Lately, I feel like I've grown a stronger appreciation for music. I've always enjoyed music, but there has been certain songs that just really stand out to me. The sound, the lyrics, the emotion, meaning, etc. For example: