Marriage, singlehood, what pushes you one way or another?

Okay.. Been thinking about this off and on, and thought I'd get my friend's input, since I have many from many different paths in life. Why do people get married anymore? You can do everything married as single, or in a dating relationship- have kids, co-own a house, have multiple partners (interesting trend in media's spotlight the last couple of years,), live together, so on and so forth. So, if you're married-why did you choose to make the plunge? If you're single- do you want to? Or are you perfectly content not being legally linked to another person? (If you don't want to be public with it, feel free to inbox me. Your secrets are safe with me :-)