Loki is a fan favorite for several reasons — reasons that involve Tom Hiddleston's charm and delivery — and we have the GIFs to prove it. Yes, he's a villain, but he's so much more than that. In honor of Hiddleston's 35th birthday this week, we're taking a closer look at Thor's brother. Here are all the reasons why Loki is the best character in the Avengers universe.