The NCT through the Porcupines are quite nice. Jim Dufresne wrote a great book on them that I used when I went there two years ago. You can't beat the views on the section through Pictured Rocks. I'm heading back up there in June for 5 days.
If you want steady hiking, views of Pictured Rocks, few people and a great place to hang, check out Grand Island. Link to trip report:
Another segment of the NCT that I've heard about from a UP outfitter and plan to do someday, is the section from Grand Marais going east along Lake Superior, then turning south through Tacquemenon Falls.
Enjoy your hike!