I like making it at home better. Then I can put nutritional yeast on it and not have all that butter, but I'm weird.

The machine I'm sure
since it's made specifically for popcorn and they buy the kernels instead of using pre-made bagged popcorn.
You can get an even better taste buying kernels and using a skillet with a lid - tastes damned good
but it's mostly the preserved butter that gives bagged popcorn the shit smell and blah taste

I googled this and there are tons of recipes purporting to recreate movie theater butter at home. I just load up every rare time I go out to the movies. At home it's lots of butter, salt, and spanish paprika.

I hate movie popcorn. I like home popped kernels with a tiny bit of popcorn oil and salt.

I think the difference may be trans fats

I actually think that homemade tastes better...because I like to douse it with hot sauce!

It's the air popper as well as flavacol. Flavacol is a butter flavored seasoning that movie theaters use. For the curious, it's not just for businesses you can by it online.