I've managed to knock a few off my list. My current motorsport bucket list would be:
Le Mans 24hr (did it last year and will go again one day)
Goodwood Festival of Speed (going next year)
Nurburgring 24hr (wont make this next year but will see the German GP next door)
Monaco GP
Spa GP
Monza GP
Monte Rally
Rally Finland
Indy 500
Daytona 500
Bonnerville
Dakar Rally
Bathurst 1000 (been 8 times but will go again)
Melbourne GP (been 7 times but will go again)
Targa Tassie (been 3 times, will definetly go again)

Could also add race team/car company factories. Would have to have Ferrari on the list. I've only managed Lotus and a couple of V8 teams.