I'm not claiming that it's so great that people would never want to leave. People don't have the luxuries that we do here, simply because of the embargo system. When you walk down the street there, there are cars all over the place, but none of them have fuel to run. Maybe if the embargo were lifted, people would live better, communism or no communism.
It's not so black and white that you can blame all of its poverty on communism. The U.S. still made the choice to place the embargo, which is in turn hurting the Cuban people. All of the systems they have there now are designed to operate with limited resources and long-term sustainability. I think it's rather remarkable that they fair so well.
Of course, none of you can pay a visit to see how interesting a country it is. Instead, you have to sit in the U.S. and continue to spoonfed the usual propaganda about how everyone there is suffering terribly...
The people who want to leave either aspire to a Western way of living (more luxuries, more waste, etc.), are impoverished to such a degree that the government there cannot help them (i.e. they have huge families or require medical care that Cuban resources cannot provide), or they simply want to see the world.