Zombies - obviously they're doing it in a much more expansive way on The Walking Dead - basically, what you used to do is you put a bunch of goo on an actor and have them shamble towards you, and it's a very effective creature. It always has tremendous impact, just that feeling of death coming for you; that's universally accepted.
Acting is the most pure fun as far as jobs go, but it can be limiting in terms of freedom of expression. You are never the master of the story, just a part of it. But writing and directing give you the power of the gods.
I love acting. I think that's the best job in the world, but I don't really enjoy the career of it so much. You don't have as much control over your life or the material as you do, well, certainly when you're a director or a producer, so while I love acting, I prefer to make my living as a filmmaker, but my rule on acting is if somebody asks me to do a part, I'll do it.
All sizes of film sets have the same level of excitement and friction and tension and then vast sections of boredom that define the process, so I love it all.