I'm not big on sweets at all, but I'll say:
Chocolate ice cream
Chocolcate chip cookies
I don't really ever eat donuts or croissant, but I guess croissant.
Plastic, because I re-use the bags for many other purposes. But really, I have about 10 re-usable fabric bags that I can wash and they each last a couple years.
Sportscar, as long as it's a '65 Mustang convertible
Portland Maine, definitely-- it's awesome. Portland, Oregon, is too close to being Portlandia.