Wow - everyone is so harsh - too harsh to keep in the spirit of community forum that this board espouses?

I actually find this to be an interesting question - we all get stuck in various programs because of habit or location. What if we took geography out of the equation? I've only had experiences with skyteam airlines, and would love to hear what people think and what the main reason is.
I'll re-pose the question - all things being equal and kinda in the abstract:
Which program do you think is the best one and why?