wind chimes are fucking awful, our neighbours had them right beneath our bedroom window, the slightest breeze and they'd be tinkling away.
I'd like to add:
have a bonfire on a gloriously sunny day when everyone's windows are open and washing is out - bonfire smoke, whilst a nicer smell, is way more pervasive than BBQ smoke. Save it for a miserable autumn evening, ffs.
have an unneutered tom cat. You may not realise what an unpleasant creature your darling pet is, but you can be sure your neighbours do, with your cat spraying all over their garden, and, if they're really lucky, inside their house, and attacking your neighbours cats, also, on occasion, inside their house, resulting in a blood-spattered duvet and cat with ear half ripped off.
I really wish there could be some way of getting everyone to co-ordinate their grass-mowing, rather than there being a continual mowing noise for the whole weekend.