In my country there are no laws that require neutering dogs. The breeders also do not impose a spay/neuter contract. Dogs adopted from kennels, however, are always neutered, either before being adopted or later depending on their age
For those reasons most of the dogs are intact. We also don´t have "dog parks" (like the ones you find in the US) buth rather "dog friendly parks" (regular ones), where dogs and people co-exist with no major issues. Usually dogs are unleashed in those parks.
It may be a surprise for some of you but things work out pretty well. Dogs get used to have contact with other intact dogs from an early age and find their balance. People get used to having dogs running towards them unleashed in most parks and don´t panic. Quite the opposite actually, most people just pet the dogs and play with them.
There are of course neutered dogs also. Either adopted or owned by people (usually ladies, to be honest) that opt for neutering.
I don´t have experience with living with a neutered dog (all the dogs I had were kept intact) but see some at the parks I go to. They do basically the same intact dogs do, with the exception of getting all aroused when a female in heat is in the area for obvious reasons.
What I´ve seen also is that - in my liimited experience at the parks - is that the interacton between neutered-intact dogs is sometimes more complicated that the one between intact-intact or neutered-neutered.