I haven't been to a Grand Prix for twenty-odd years or watched one on TV for probably ten. But I still remember as a naive student cycling out to Silverstone for the Saturday practice of the British GP one year in the 1980s. I had no idea where I was going, but I found my way to one of the spectator bankings on one of the straights just as a Ferrari shot past at full speed. The sound - the speed - the colour - the atmosphere - the engineering perfection - the skill - the supporting infrastructure - that one moment was me hooked for the next decade.
I think it benefits everyone to have surrendered yourself to a crowd at least once to understand the effect it has on you, and for me it was Mansell, me, and about a hundred thousand other spectators, versus Senna and about two lone spectators, the year Senna ran out of fuel on the final lap, coasted to a halt right in front of where I was standing, and Mansell picked him up on his victory lap.