IT depends we generally hold separate accounts so we can get double the promotions as if you have a joint acct you only score once. Good example was Hilton 4 for 50,000 points last year we scored 100,000 vs 50,000.

On the other hand we do have some accounts in only one persons name because the spouse never participates (especially business activities) we can request 2 awards if we have the credits and it avoids having a small number of credits in account and paying transfer fees if available or getting more magazines. So sometimes when we fly I will be getting NWA credit while my husband will get CO credit as it rounds out an award.

Hope this was helpful ..it really depends on your habits and level of activity.