Favourite Visual Artist
There's too many, but the top three are sugarmints, Slamacow and xHappyello.
Favourite Movies
Sherlock Holmes: A Game of Shadows, How to Train Your Dragon, Avatar, Alice in Wonderland (2010 Disney film), Harry Potter
Favourite TV Shows
Detective Conan (AKA Case Closed). I don't actually watch TV, though. If web series count, there's also RWBY.
Favourite Bands / Musical Artists
Sarah Brightman, Alessandro Safina, Two Steps From Hell, Evanescence
Favourite Books
Die unendliche Geschichte, Wenn das Glück kommt, muss man ihm einen Stuhl hinstellen, the 1001 Abenteuer series, Conni & Co, Bitterblue, A Song of Ice and Fire, Harry Potter, Bitterbynde Trilogy, White Fang, The Iliad, The Odyssey and a lot more.
Favourite Writers
Cecilia Dart-Thornton, George R. R. Martin, J. K. Rowling, Kristin Cashore, Lois Lowry, Michael Ende, Mirjam Pressler and a lot more. Also see my FanFiction.Net favourites.
Favourite Games
Minecraft, Kingdom of Loathing, Mount & Blade, Frozen Essence
Favourite Gaming Platform
PC
Tools of the Trade
Keyboard, MS Word 2010, imagination, pencil, eraser, pen, Paint.NET (sometimes)
Other Interests
I can only think of roleplays, especially text-based ones. Does Tumblring count?