some of the 'reunion tours' (Guns 'n Roses, Van Halen).
personally I get the feeling some bands just do a reunion tour ONLY for the money, they don't want to tour, don't like eachother.
some of the shows imo are not worth the expensive tickets.
where as with latest ACDC tour it seems they spend huge on the show, lights/fireworks...
would have suprised me if Angus/Cliff did not give the fans a great show.