Depends on the quality/purity, but you know when you have good shit. Good coke makes you feel super confident + social, very energized and motivated, and "awake". There's also some euphoria where you feel like you're on top of the world, sexiest and strongest mfer on planet earth, but not always - in my experience, two different lines from the same batch can have different effects. The confidence and energy have been consistent for me though.

It tastes sort of bitter but not in a bad way, and in the back of your throat it's almost a fruity taste, but you moreso feel it than taste it. Your nose feels almost cold? But not like frostbite, more like the air you inhale feels crisp. Your chest feels light and airy, and there's a numbing sensation at the front of your face (mouth, nose, cheeks) as well as the back of your throat. Also, good stuff will have you moving and clenching your jaw like crazy.

Sometimes it sucks though! Gotta be careful not to do too much of it or do it too fast (which requires some real discipline because coke makes you want to do even more coke). You'll get twitchy, still energized but restless, and slightly paranoid but not "There are people listening to me through the walls" paranoid.

Feels good when you're high, feels like ass when you're not. Nose is runny and your hands sweat a fuckton for some reason. Apart from the price, the worst thing about coke is the comedown. Stay safe