ALL OF THE ABOVE! In my experience, every woman IS different. The key is the right speed and pressure; take it slow and build the anticipation.
There is nothing that compares to the warm, wet feeling of a lover’s mouth caressing her most sensitive (clitoris) and private parts. The softness of a pair of lips, the heat of a mouth, and the slick feeling of a tongue sliding around and over the vulva is a sensation like no other. The feel of a lover’s mouth on a woman’s genitals offers sensations that fingers, sex toys, and penises simply can’t provide.
Try these stroke and rhythms combinations:
Lick lazy circles around her clit.
Lick side to side or up and down.
Use short, rapid upward strokes, alternated with dipping into her vagina.
Alternate small, focused circles on either side of the hood.
Lick, plunge in; lick, plunge in.
Use the "ice-cream" licks up and down.
Swirl your tongue in the space between her hood and mons, and rub the outer labia with flattened fingers.
Lick the ABC's on her vulva making contact with her clitoris.
There is an excellent book by Violet Blue titled, “The Ultimate Guide to Cunnilingus” 2nd edition, How to go down on a woman and give her exquisite pleasure.