I have often wondered what "DO" stands for.
At this point, I have made precisely one return trip on EK, but I am planning more, and it may become one of my two preferred carriers. I have spent years based in North America and just made 1K (roughly speaking, platinum) in the United programme, but there are few entities on the planet that I despise as much as UA. (And as nearly as I can tell, they feel the same way about me.)
I don't know if I will be able to make it, it might depend on timing, but I am based near SIN now, and expect to travel to LON a lot, transitting in DXB if it is on EK. And if it offers any opportunity to improve my rather retarded Arabic language skills, that's a bonus