"Must be gettin old..."
Nooooo wayyyy man!
What you have to remember is Metallica have been doing this since the early 80's and the folks who went to see them then would probably give their right arm to go and see them now.
ACDC sell out stadiums, Led Zepplin sell out the O2 arena in seconds, Iron Maiden win the best live act at the Brits. There is even a film about a little known Canadian band called Anvil doing the rounds at the moment.
It's not teenagers doing this it's their dads and grandads.
From the moment you enjoy listening to metal, then most other music just sounds rather plain and boring.
The day that you don't reach for your air guitar when you hear the intro to "smoke on the water" is the day you "Must be gettin old..."

I dread the day when the nursing home I get interred in stop me playing "harvester of sorrow" or "seek and destroy".

Mind you I have to make sure that the wife is out if I want to crank up the stereo to "11".
