Don't confuse your opinion with the majority of frequent flyers which is something subjective which is unlikely to ever be proven.

Personally I find Star now has so many members that if you aren't on your home airline, you earn points and status but aren't treated much differently than any other passenger. From my experience, OW as the smallest of the alliances treats alliance elites a little better, extending to top tier Emeralds being able to access partner First Class Lounges. Do I miss alliance wide luggage benefits, a strong hub in Central Europe and partner airlines in mainland China? Yes. Am I glad I don't have to hub through Houston or Atlanta or have to fly US Airways or United? Of course.

But that's all my opinion and to paraphrase Woody Allen, "Arguing about the best airline alliance is like dancing about architecture".