Well Mercy was a nice place until Longbow started their criminal invasion and through their war crimes have decimated large portions of this once beautiful area.
Port Oakes isn't bad its a nice port town, with local sport venues, and a wonderful business district.
Cap is a technological wonder, with a small town charm, a port, and a university.
Sharkhead is a large Port and mining operation with row houses for the local workers.
Nerve once again would be nice a series of Ports and tourist Isles but Longbow continued military incursions should be brought before the UN.
St. Martial is a lovely tourist destination with casinos, resorts, and some Ports.
Grandville is the seat of power for Arachnos and is largely a military installation.
If the unsanctioned invasion of Longbow would cease, the Rogue Isles would be a great tourist and business destination. Unlike Paragon City which has large swaths of the city uninhabitable from the continued "hero" elements which causes untold loss of life and billions of dollars in damage, a few areas slipping into other dimensions, and some of the most dangerous creatures and criminal elements assaulting everyday citizens. The "Rogue Isles" are a paradise.