Top 5 Lost Questions I Suspect Will Remain Unanswered

I have now viewed every episode of Lost except the last half of it's last episode, "The End," and it is looking highly suspicious that there will be many questions left unanswered.  These being:

Who built the Egyptian styled temple and tall three-toed statue?
What are the significance of "The Numbers": 4, 8, 15, 16, 23, 42?
Who is Alvar Hanso?
From where did the island's protector's come?
From where did the island come?

To summarize lost in a Cruise Line Advertising Slogo:

"Come to the island where CJ Craig protects the tri-force."

I guess, as with many things, the theme of my SAT II Writing test holds true even with Lost: "It is better not knowing."  As different mysteries became answered on Lost, it became less interesting.

By the way, I only scored an 108 on my SAT's.