Only the American editions of the book illustrations portrayed him as having a goatee. The actual description from the books state
"Snape is described as a thin man with sallow skin, a large, hooked nose, and yellow, uneven teeth. He has shoulder-length, greasy black hair which frames his face, and cold, black eyes. He wears black, flowing robes which give him the appearance of "an overgrown bat". The youthful Snape had a "stringy, pallid look", being "round-shouldered yet angular", having a "twitchy" walk "that recalled a spider" and "long oily hair that jumped about his face"
You know I actually hated him in all the movies before the last I was like "that guy's just a big jerk what the heck is his problem" then I saw the last movie...I cried my eyes out! and now...he's my fav...
I'm just revealing now that Snape has ALWAYS been my favourite character,because before,I was afraid to say that Snape was my favourite HP character,'cuz people would've made fun of me saying that I liked a sourpuss.