I would prefer a society where people all chipped in for some sort of greater good, in all honesty, but in today's current situation, I find such a perfect vision a mere fool's dream. It's for this reason that I would rather go for a capitalist ideology where I have more control over what I do and what I receive.
By definition, communism would be an "extreme form of socialism where a classless society is achieved, private property does not exist and all things are held within common ownership". While this does sound fantastic, communism isn't just a political system but an economic system which tries to enforce some sort of social equality by giving out an amount of capital to each person, depending on what they need, or, what the government thinks that they need. I can't really give my whole trust to a bunch of politicians who constantly bicker among each other and try to find new ways to get their people's support.
Like
>>9 said, humans will eventually find themselves in a desire for more power and will corrupt. But this is practically like all government ideologies. They all, at some point in time, become corrupt, so what sets communism apart from capitalism? From what I've learnt in history, from the Russian revolution, especially, communist countries will find themselves to be a one-party state which is the one of the main reasons as to why I prefer capitalism, overall. Capitalism is mainly an economic ideology, but in practice, it usually involves a democratic system in which we are able to vote for which person we would like to lead our country. So if a politician, for some reason becomes unpopular with the masses, parties would have an incentive to give them the boot in order to gain more votes. I admit that capitalism isn't a perfect system, but for now, I believe that it works well enough in a lot of countries.
Although I think my opinion here is pretty lengthy, I'll end my two cents with a joke I learnt at school:
"Capitalism is when you have two cows and you are free to keep the milk for yourself. Socialism is when you have two cows and you give one to your neighbour. Communism is when there are two cows, the government takes them, and gives you some of the milk. Fascism is where the government steals your cows and shoots you."