I agree with the other guys
It is important to remember your pending total change of life style.
Dubai, is totally different to almost all of the Middle East.
Beirut is so different too.
The lists provided so far are comprehensive.
As Mutt stated the free internet when in the hotels is 101% critical, Communications with family works via your lap top.
A commute schedule is slowly entering the Middle East, most are 11 on 1 off.
Getting your family visits organised, and covered by the company is a good point, but not often included.
There is a big difference in employers, some are major players, and very good, and others are very small and very good. ASK the guys on the ground, before you join the team.
Even then you could get it wrong...
windy