I like San Francisco as the location for WWDC better. I have only been to one WWDC in San Jose(compared to 8 in SF) but I like the Moscone Center better and there is more to do in San Francisco. I was hoping that they would move it back after the construction work was complete. I know it closer to Apple HQ so it makes it easier for the employee's to get there and it is probably cheaper to rent then the Moscone Center but overall I didn't think San Jose was that much cheaper for me.