Abu Dhabi = hot and humid as fuck. I've spent summers in the American south, and that isn't shit compared to the UAE, where I've also lived. I'd pick Spain without hesitation because the poon is finer and more plentiful, and you don't have deal with the Muslim bullshit such as Ramadan and censored Internet (ie, no porn sites, etc). I've also visited (although not lived in) Spain, and you can't go wrong there if you're a young guy - in comparison to the Gulf region.
yeah, financially Im in a pretty good situation, so Im leaning towards Spain. The cultural elements of the middle east are definitely one of the downsides.
Dat dere humid desert