Originally Posted by cundo

My future earnings potential? That's tough. The way things are aligned right now, I'll be earning Delta on my flights indefinitely and be staying at a Marriott location in just about all my trips.

What can I say? I'm Marriott's & Delta's ideal customer.

Therefore, I can earn MR or DSM and will have some use for them in the future. Apparently neither MR or DSM offer here really tips the scale. It'll just be what I fancy prior to check-in at the hotel, then.