I know I've said this before, but 1982 was the tops for me. We got the full Supper's Ready, the Lamb, and at least the truncated '76 version of Watcher. The band was at it's peak in terms of energy and their playing, and they looked like a bar band in their t-shirts and jeans instead of those godawful Miami Vice suits, circa the IT tour.
Would have loved to have seen them on that tour. Fantastic setlist and band at peak of live performance, totally locked in. I was only 11 though. I was never into 'pop era' Genesis myself but they were arguably the biggest band on the planet at the time of those Wembley 87 shows and you couldn't help getting swept along with it. One huge Genesis homecoming party for band and fans, brilliant.