1.- Yes It was worth for me to move here. And I do not regret taking that decision

2. Some have an attitude and some don't. On the dress code I would suggest comforable clothing since here it's summer and temps go up to 45-50. But a side note would be make it comfortable but not disrespectful to the culture/customs from the country.

I have seen ladies here in "naked" arms (or part of them) and medium to long skirts. (The other ones can be worn upong going out to party; but still discretion is advised :-)

3. Doha is so multicultural that you have people from almost everywhere in the world: Asia, Australia, Aurope, Latin America, Central America, USA, Canada, etc.....and yes there are Europeans here too

4. Some "clubs" in some of the hotels are the only variety here for going out to party; and music varies from place to place. And in the end people tend to get together and party with "similars" as a way to enjoy the same "taste for music"

Hope this one helps you and if you need some more info just let me know

Regards!!