I remember a time when some people thought the USO was the most important major to win.
Nowadays, the USO has really lost a lot of its luster. Horrible scheduling, a bad time of year due to weather and NFL, poor facilities and location, etc., etc. Meanwhile, RG has become super important for CGS reasons and the AO has become a fantastic tournament with great play quality.
If I were a player, I'd still probably win the USO, but it would be close, and highly colored by the fact that I'm American.