This is a wonderful place for some delicious popcorn in Vegas!
It's tucked away in a small shopping plaza on Eastern, and there is one other location in Vegas too (I wish there were more!).
Inside you'll find a small, clean store with friendly staff. They have a ton of options in both flavor options and packaging options from small pre-packaged plastic bags to huge gift tins. They have a large tub you can buy and then bring back over and over to refill for a discounted price. It does not seem too expensive; a large pre-packaged plastic bag is $5.
They have savory and sweet flavors, and they have rotating seasonal flavors that change every month or so. Currently (April) they have an awesome "Oishii Nori" Furikake Japanese snack mix flavor (sort of a salty, seaweed flavor). I know it sounds weird, but it tastes goooood!
I have also tried the "La Famiglia" flavor which is a savory Italian flavor that is sort of like eating a pizza (if you can imagine that as a popcorn) rich with Italian seasonings. The white cheddar flavor is also awesome, and this is from someone who is not always a huge cheese fan. For something sweet go for the s'mores flavor. It has chunks of graham cracker throughout for a wonderful crunch, and it is delicious!
Try Popped for some awesome popcorn whether you want a standard flavor or something unique!