I love taking scenic drives in Michigan especially along the coast. I recently started a scenic drive in South Haven and headed north along Lake Michigan. Rated as one of the best is also a cruise next to Lake Michigan is US-2 on the south UP coast taking you St. Ignace to Thompson.
The 90 mile drive shines with the Epoufette Scenic Overlook.
Also get out of your ride and explore Kitch-iti-Kipi.
Yes, the reason it's called Pure Michigan. More here.