Skip the microwave stuff. It takes just 10 minutes to make this fun, healthy snack from scratch.
In a large heavy-bottom saucepan, stir together 1 tablespoon olive oil and 1/2 cup popcorn kernels; cover partially with lid to allow steam to escape.
Cook over medium heat until popping slows, 4 to 6 minutes. Remove from heat; let stand (covered) until popping stops, 1 minute. Toss hot popcorn with more oil or butter and salt, as desired. (For other flavorings, see below)
Combine paprika, salt, cumin, cayenne, and black pepper. Toss hot popcorn with oil to coat evenly, then toss with spice mixture.
Combine sugar, cinnamon, and salt. Toss hot popcorn with melted butter to coat evenly, then toss with sugar mixture.
Combine Parmesan, salt, and pepper. Toss hot popcorn with oil to coat evenly, then toss with Parmesan mixture.