Best was Sex Pistols at the Trump Borgata, Atlantic City 2003. Every song a classic, all killer no filler. Just on the edge of the mosh about 15-20 feet directly in front of Steve Jones; of course, Johnny was all over the place. 9:30 Club show in DC that year was great too, but I was further away from the stage.
Worst was Journey opening for the Stones at Rich in 1981, trapped because it was general admission and you couldn't leave your spot... and soaked from the torrential downpour. They were beyond brutal. Worst headliner was Yes in 1979, Don't Kill The Whale smh...