Cayenne might be the 3rd most popular in americanized-foreign cuisine after green bell and jalapeno, you have probably eaten them in prepared food... even chili powder typically contains cayenne or a near relative. Since they are thin walled, they aren't as enjoyable to eat raw from a texture perspective nor grilled or smoked, but in soups, on pizza, pretty good flavor without enough heat to keep you from reaching for your favorite hot sauce... but hotter than serrano, usually.
One nice thing is they are faster to sprout and produce ripe fruit than many others.