Senegal or Green Cheek?

Any ideas of which bird is a better companion? From what I have read, they are pretty similar in needs...I would be at school all day but someone would be home to keep the bird company most of the day....And Senegals are a LOT more expensive? Is it just because they are harder to find or what, is there some horrid character flaw in a Green Cheek? Yes, I know it depends on the bird, but just tell your personal experience and preference?