I don't get to Anfield any more but watch most games on live streams. The best atmosphere I've 'experienced' in recent years was the Leicester 3-3 in the League Cup last season. Incredible. As the game went into injury time at 2-3 I wasn't too bothered because the atmosphere made the game for me. Night match, big away following, going 0-2 and 1-3 down, plus a slightly weaker cup line-up - all these things made the atmosphere, especially in the second half, fantastic. The crowd carried the team that night.
But, and I'm educated guessing here, I imagine the main thing that night was the crowd was made up of a lot more supporters who don't get to go every week? So, more enthusiastic, just glad to be there.
I started going in 1978 pretty much thru to the early 2000s. As others have said, the atmosphere was rarely great week in week out but one thing you could rely on 9 times out of 10 was when we went a goal down the crowd would react. Or if we were level going into the last 20 mins the crowd noise would gradually build to a crescendo. I'm thinking v Forest in 82/83 v West Ham in 86/87, v Charlton in 87/88 etc etc. Not 'big' games just games where we were struggling and the crowd helped.
I don't hear that now - last season when we went 1-0 down to Spurs, with the title on the line, and we equalised I was expecting the crowd to carry the team along but it went back to hushed anxiety. I don't get it - it's not as if there isn't a team out there to have belief in. What is it? One home league defeat in six years with a crowd present yet the crowd is still nervy and quiet when we're losing or pushing for a winner. Unless it's Leicester at home in the LC.
I think only being to roll up and pay at the gate can solve this problem. But obviously for a lot of good reasons that isn't going to happen. Or maybe make it 45s and under on the Kop - once you hit 45 you're moved to another part of the ground. Hey, just talking off the top of my head!