Dubai is certainly a lot more different than your home country, especially if you come from Europe or the USA. There are some cultural, religious and legal issues that you should be aware of even before deciding to move to and work in the emirate. You have to keep in mind the fact that the Dubai laws are closely linked to the Islamic ones. This is not a reason for concern, but you might have to modify your social conduct to fit into the local social environment.
The most notable matter concerns the dress code, especially when you are at work. You have to wear appropriate clothes at work. This is particularly applicable to women. You should not put on short skirts and tops with thin straps. This should not be a problem since these types of outfits are inappropriate in most offices everywhere in the world. You should avoid wearing any garments, which are too provocative, in public. You might have legal charges pressed against you, even though this hardly ever happens.