I like socialism because the whole theme behind it is commonality and a sharing/division of resources equally (or somewhat) between people. Unfortunately it won't work because people are greedy, jealous, and hateful. When they see that they are working harder than their next door neighbor for the same benefits, they get all pissy about it...which I don't blame them as I would myself because I'm greedy, jealous, and hateful.
I like capitalism because as a system where the objective is the pursuit of personal wealth I can become richer than my neighbor. The theory is that by working harder, I'll become richer, but thats not always the case as my neighbor could simply inherit his/her money, but hey at least I get an opportunity at trying, although statistically speaking, I won't make it, but whatever. Plus capitalism incentivizes people to be more creative and innovative. Also once I get to the top, it probably won't be too hard to keep my neighbor at the bottom.