There is a competition to win a million Star Alliance miles in any program (with some exceptions).

http://mileagemillionaire.staralliance.com/
http://www.staralliance.com/en/mileagemillionaire-TC

You can choose one of the following prizes:

"Aeroplan® (Air Canada)" 1,000,000 Miles
"Airpoints™ (Air New Zealand)" 20,000 Airpoints Dollars™
"Amigo (Avianca Brazil)" 1,000,000 Points
"Asiana Club (Asiana Airlines)" 1,000,000 Miles
"Connect Miles (Copa Airlines)" 1,000,000 Miles
"EGYPTAIR Plus (EGYPTAIR)" 1,000,000 Miles
"EuroBonus (SAS)" 4 SAS Round The World Business Class Tickets
"Flying Returns (Air India)" 1,000,000 FR Points
"Infinity MileageLands (EVA Air)" 1,000,000 Miles
"KrisFlyer (Singapore Airlines)" 1,000,000 Miles
"LifeMiles (Avianca)" 1,000,000 Miles
"ANA Mileage Club (ANA)" 1,000,000 Miles
"MileagePlus® (United Airlines)" 1,000,000 Miles
"Miles + Bonus (Aegean Airlines)" 1,000,000 Miles
"Miles & More (Lufthansa, SWISS…)" 1,000,000 Miles
"Miles & Smiles (Turkish Airlines)" 1,000,000 Miles
"Phoenix Miles (Air China, Shenzhen Airlines)" 1,000,000 Kilometer
"Royal Orchid Plus (Thai Airways)" 1,000,000 Miles
"ShebaMiles (Ethiopian Airlines)" 1,000,000 Miles
"Victoria (TAP Portugal)" 1,000,000 Miles
"SAA Voyager (South African Airways)" 1,000,000 Miles

So which miles would you choose, which are considered the most valuable? Assuming no status or previously earned miles.