Talking a while ago now, well 15 years plus but Doha was interesting aka not quite complete. Improved then?
They opened a new, money-no-object airport a few years back. Money-no-object except for the roof – which leaked the first time it rained 🙂
Qatar Airways want to compete with Emirates but they’re nowhere near the scale or number of connections to/from key destinations. However, this does mean Doha airport is somewhat smaller and more pleasant than DXB. If you’re there in the middle of the afternoon it’s like a ghost town; in the middle of the night it’s manic.
For ~£35 you can use the gym (well equipped) and swimming pool (25m) at the transit hotel. It’s seldom very busy and probably the most pleasant place in the airport. It’s certainly a better place to kill a few hours than any of the lounges.