I remember it snowing on quite a few when I was in Ohio. I also remember it being so cold I had to wear a jacket over my costume. I guess good weather depends on where you live. Florida my son wore flip flops with his spider man costume.Nice weather on Halloween night. Such a rarity. I just don't recall so many terrible weathered Halloweens when I was a kid. Maybe I was just to happy to care.
Wet tomato plants, for me. Hate red tomatoes, but love the scent of a freshly-watered tomato plant. I too am quite fond of old book smell.Baseball card smell for me... loved opening a new pack.