In my experience, if you want to go all out during your stop, I think its the little things around the DXB F lounge like A la carte dining in the lounge and a massage before/after. I don't do the massage but was told it was adequate for what is offered by EK. A tip is to sit in the couches around/before the main dining area, as that is where the service is more attentive, and you can get anything you want quickly. They are the ones to the right of the covered dining seats as you walk away from the door.

Crew is a big factor as these days its a hit and miss, so for me that is what would make or break your flight. EK is a carrier you need to judge on different routes to know how good it can be. But the Europe/UK flights have been good for me. Try and notice how different the crew attitude is depending on their fleet as well. You may find the 777 guys/gals better.

On the A380, the bar to socialise is fun depending on the time of your flight. I also always liked to have a shower before landing as it seems to help maximize your day at your arrival city. Make sure you book a seat in row 2 or 3. 1A/K seem smaller and are practically in the shower area lobby, and 4A/K are noisy and practically in the galley.

Food onboard EK is OK for me, the arabic mains are good though (big gulf rice dish fan), these are usually on flights into DXB. EY J was way ahead in terms of quality as well as presentation and quantity. Ek always seem to just throw everything on a plate IME. And the cookies and madelines on EY are one of my favorites snacks! I haven't flown EY F yet.

I'm sure someone will come along soon and add that you should load up on the Dom

Best of luck