Originally Posted by DownUnderFlyer

In regards to *A, LH has a great program if you fly a lot of paid C or F or if you fly a lot within Europe on everything but the cheapest fare.
Otherwise AC is a better program for you.

Within OW, generally people say the best program for the casual flyer is AA. Reasonably easy to get status and cheap award flights. The only disadvantage I can think of is no lounge access on purely US domestic itineraries.

But, with *A and ST and OW you might be spreading yourself a bit too thin. If all your flying just gets you 50k miles p.a. you should put all your eggs into one basket so to speak.