Scary isn't it, how time flies! 40 years now, wow.
I went to a KISS concert in Brisbane in '81 I think. I had worked night duty the night before and drove the 3 hours there without sleeping, kipped in the car a bit and partied all night.
The second time I saw them was the 35th Anniversary Tour. Total KISS awesomeness! I was sitting on the side of the stage, rather than in front, about 3 rows from the front and nobody in front of me, right near Gene. Who played up to my fangirl self all show. Bliss!!
The only other concert I've enjoyed that much was Alice Cooper. I paid to be right up the front (huuuuuge fan!) and when he got 'decapitated' I got a fake blood splash right in the face.