Al Ain
Wel, I drove through it a month ago. It is much smaller than Dubai and smaller than Abu Dhabi, I think. It might be equal. It is against some mountains and Oman is right across the border.
It is a pretty city actually and has plenty of vegetation, flowers, and palm trees. It hs an international airport and makes a good diversion airport with better weather probably because it is away from the water meaning less fog. I recall the Royal Air Force had a training base there for the UAE.
It is roughly 1:30 - 2:00 hours from both DXB and AUH.
I don't think it has toomay flights and far less than AUH and DXB.
Would I live there if based at AUH or DXB? Only if I wanted a smaller town and was willing to drive about 2 hours to work.