Yes I'd go for the fireman too, sweaty and smoky...
Has to be clean sweat though not dirty rancid sweat 
Other smells;
My loved ones neck and head (when I'm not single) although I did have a partner years ago with an odd smell I didn't like, not bad or dirty just different
Petrol
Thunder storm
Wet autumn leaves
Freshly cut grass/hay especially if I can hear the lawnmower/combined harvester in the background
Jasmin, Hyacinth, Lillies and Lilac flowers in particular but all flowers and plants really
Petrichor (thanks for the new word)
Coffee beans/powder
Tobacco leaves
Baby heads and necks