Al Hilal always gave the impression to be a better built team compared to the other ones. The don't have any real superstar but they have many extremely good players in all roles. Al Nassr is all about Ronaldo, and this is both a blessing and a curse. I also like a lot Al Ahli because despite the limited amount of foreign players they obtain excellent results. To be honest at the end the most disappointing team has been Al Nassr, everybody were expecting them to win everything and they ended up with nothing.
Just can't stop laughing about your statement that getting Cristiano Ronaldo was a blessing and a curse to Al Nassr. The Portuguese have contributed greatly to the club but he has not led them to win the Saudi Professional League. Maybe your assumption that he is also a curse is out of his domineering nature. He wants to dictate how the club is run and the huge wage he earns. But it seems Al Nassr is comfortable with him, that was why his contract was extended. Al-Nassr is currently topping the League after one game due to a five-goal advantage. Let's hope they continue because Al-Ittihad Club and Al Hilal SFC are strong contenders.
Cristiano Ronaldo's arrival in Saudi Arabia has not only improved his team, but all Saudi teams. That's why I think his arrival in the country is a great opportunity. He may not have won any trophies with his team, but he instantly elevated the country's football reputation. So, what he's done is invaluable.