An unequal distribution of wealth, at least in America today, implies that great success is possible (in a system with less income mobility it might imply something else, but that is not the case here). Given the right combination of luck, brains, talent, hard work, or beauty, you too could become fabulously wealthy. Your startup could be the next Google, or Facebook. You could be the next Bill Gates. And if your plans for greatness don't pan out, well, even the bottom quintile has it pretty good compared to most places.
In the other graphs, the chance for relative comfort is increased (assuming a certain base standard of living), but the chance for huge rewards for great success is drastically reduced. In the Utopian version it is non-existent: No matter how hard you work, you will get the same result.
Maybe I am still young and idealistic, but frankly I prefer the first graph. I'll take freedom over security, and a chance for greatness over comfortable mediocrity.