462.625 detroit, also toledo
462.675 macomb/mt clemens, also one in maumee
462.725 ottawa lake
462.700 ann arbor
462.575 troy (also saginaw, and a second in toledo)
462.725 flint
462.600 livonia
detroit/mt clemens, troy, livonia, flint and ottawa lake see the most traffic (in order from most to least)
462.625 and 462.575 are both pretty active in toledo as well.
ann arbor is pretty quiet but it's there and covers most of the city quite well
during tropospheric events, I can talk into the Racine, WI repeater from my QTH in Western Monroe county using a homemade Jpole at 30' with about 4W ERP.