Typically if you stay on the outside of the loop you will be ok. Now there are some good parts inside 465 but only a few. also on the east side. outside of the loop can be bad too. Until you get pretty far outside 465.
North / North East Burbs are The " Highest Class " of the city.
West is more of the normal type of people but can get ritzy in some parts.
South is pretty normal too. With a few spots of really nice homes but the people arent stuck up.
East - I never really liked the east side.