I'm not particularly laid-back, I can be fairly relaxed about some things. However, if I care about something, I care far too much to be relaxed about it. Although this probably causes more stress than it might otherwise, I think that the point of my life is not to avoid stress. I would focus on sedimentary rocks if that were the case, or bad geology related humor. I'm sure that there's a market for the latter in some corner of the world.
I've spent the past eight months trying to make myself into the person that I felt I needed to be, unfortunately it seems as though every time I improve on something, that I become more deeply involved in it and set my goals higher. So I don't think I'm the person I want to be, yet, but I think that it's a good thing, to always strive for that.
Well this isn't the best self-summary, but it does help illustrate at least a little about me, if you want to know more, you can ask me.
For books, I read a lot. When I was younger (early teens or so) I read mostly fictional geeky stuff. For example: Tolkein, David Eddings, C.S. Lewis, Heinlein, Asimov, Orson Scott Card, and dozens of much crappier science fiction and fantasy authors (whose names I don't remember I probably would if I reread their works though). When I was in college (the first time), I had a serious crisis of religion and I read a huge amount of philosophy and theology. I tend to enjoy both to this day, although I don't read nearly as much as I used to.
Let's see with movies, I like almost everything. I watch movies that are bad, sometimes because they are bad. For example I've become increasingly fond of MST3K, although sadly I have willingly watched some of the movies they lampoon outside of MST3K. I love watching popcorn movies in theaters, like Transformers (which if you can ignore the plot and the dialogue, and the acting is actually pretty okay). I missed summer movies for a couple summers and really got into watching them after. I also like serious works of art type movies, for example Citizen Kane (which is sadly the standard answer), also things of social or political significance.
For shows, it varies, I tend to be pickier than I am with movies (probably due to the time commitment), but I tend to be picky about weird things. I can watch anything from Sitcoms to serious works and enjoy it, but I don't enjoy all sitcoms or serious works.
I have really diverse musical tastes. When I was younger I used to listen to mostly heavy metal and some punk. Then when I was deployed and listening to music at work I got tired of it and started to spread out more. Like with TV shows I am picky though, I can name songs and artists I like from almost every genre, but I don't like all artists or songs in any genre so I have a wide breadth of styles I listen to, but not as wide breadth of artists.
I've learned that I can live without love, I can breath, eat, stay warm, stand on firm ground, sleep, work, play, all of those things. But I've learned that I don't want to.