Will probably always be the first show ever - it's such a mindblowing experience for a kid to see his first live rock show.
So for me it was Bon Jovi and Skid Row when I was just a mere teenager.
Then seeing Guns n Roses during Axl's big comeback tour back in 2001 or 2002.
And always the last show. Saw Hardcore Superstar from the front row at the famous Whisky A-Go-Go. Amazing show, Hardcore is as good live as any rock band out there right now.