I did my first FOS this year, and it was utterly brilliant. Watching Hamilton go up the hill in last years car, but what turned out to be his first championship winning season was a particular highlight, as was watching the current crop of WRC cars being run ragged through the rally stage. Getting up close and personal with all the supercars on the Sunday Times stand was very awesome, even if the Veyron bit was sadly roped off (poor show says I ). Oh, almost forgot 009 being there, just weeks after I'd watched it take 1st in GT2 at my first ever Le Mans!
It was a very good weekend, but I'm not sure if I'll do it again next year as much of the stuff will be the same. Almost certainly make it the year after, though.