Best airline to get status with as an SF resident? I travel quite a bit for work. Most of my flights are to other major cities with 2-3 international trips a year. I've been building up my status with Virgin America. 

I know United has an SFO hub and a ton of international flights...but I dread the thought of dealing with United's shitty customer service and operations. Any other airlines I should consider? How's Delta's coverage? Is Virgin/Alaska my best option?

update: thanks for all the feedback. Really good insights. I'm still sticking to Virgin/Alaska mostly since I fly domestic to major cities and the quality of the product is superior for now. However United seems to be improving. Worth evaluating again next year. 