Not that I want to put any of you off the idea of QR .... but it is a VERY difficult company to work for (read some of the threads on here) ... and Doha is probably one of the most boring places on earth to live ... and I mean B.O.R.I.N.G. Nothing to do, place looks half finished, spend all your time with the same small group of people (OK if you've lived the expat lifestyle before, I guess), hellish summer climate ..... I could go on!!
If you're considering the Gulf, Dubai or Bahrain are MUCH nicer places to live.