I've not visited yet, but I hear NYC is very similar to London. People often get London burn-out, similiar to the feelings you're describing about feeling fed-up with living in NY. I understand where you're coming from - bad attitudes, high pollution, non-stop waves of people everywhere can take its toll on you. But that's part of city life.
Think of what you'll be giving up - hustle bustle (moving to a greener area can feel very isolated when you're used to the city), excitement (greener places are pretty to look at, but they tend to be quite boring after the novelty of the scenery has worn off), everything open 24-7 (living outside the city is not as convenient, things are often closed after a certain time).
I love city-life, but when I catch myself feeling the grey concrete slabs, and sour-faced unhelpful people more than the benefits of city-life, I try and get out of the city for a weekend or something, to somewhere pretty and peaceful to recharge my batteries. But after a day or two in the beautiful countryside... I start missing the city. Maybe, regular breaks out of New York to somewhere completely different, with green spaces and friendly people will be better for you, than completely uprooting and moving out to the styx.
see i don't understand this mentality. i grew up in the suburbs, which is neutral ground between rural and city life. i prefer more rural settings. when i do go into cities (and even here, around where i live in the dc metro area), i get really tired of seeing pavement, machinery, and people all day. if i don't see natural topography (that is, un-flattened) or greenery for several days at a time, i start feeling like i'm missing something.
i haven't been to too many big cities, but i have learned that chicago makes my eyes hurt (no trees) and manhattan is my personal hell; i can barely think straight with so many people around.
personally, i don't think the benefits of a city outweigh the costs (different strokes for different folks, granted).
ok look. it's not my fault that i'm awesome. thank you. and you're welcome.