One of the big advantages of working for airlines in the UK is that you can voice opinions and raise objections without concern. Can't do that here.
You also have a free healthcare system which on the whole works well and is actually interested in your health rather than how deep your pockets are.
Same goes for the education system which, despite its detractors, is amongst the best in the world whereas the UAE system is near the bottom.
Finally, don't be fooled by the "tax free" salary - you will get robbed by day to day living costs.
I'm not sure a real value can be put on freedom of speech - millions have died for it.
You can make a life here but it requires massive patience, adaptability and a great sense of humour.
Good luck in your decision - you seem like a reasonable chap, I'm sure you'll be fine :-)