I can't compete with most of these ('weeing in petrol tank'
)
but
Best - general taking-in of parcels, keeping an eye out when we're on holiday, signing passport applications (my neighbour who's a JP), having us round for Xmas drinks and mince pies and, this goes for most of the people on my street, being up for a friendly smile and nod/passing of pleasantries/full-on conversation and a giggle.
Worst ? honestly can't think of much, although there is a guy who revs and revs his noisy motorbike for ages on the street sometimes.
Also the family who had a two-day-and-night Indian-style wedding in a marquee in their back garden, two doors down, in the summer so our windows were open and it was NOISY. But mostly I was annoyed because it sounded like a hoot and they didn't invite us. 
I'm in London, and I think a lot of people expect to find that I share a street with addicts/pimps/ferocious dogs etc, but in fact it is a peaceful residential street and I have lovely neighbours.