The neck is really three placements. The nape, at the back below the hairline, takes small pieces and can be hidden by hair or a collar. The side of the neck suits vertical designs that run from behind the ear toward the collarbone. The throat is the most visible spot on the body and suits symmetrical pieces, like a bird, a rose or an ornament centered under the chin.
Neck skin is thin, moves every time you turn your head, and gets a lot of sun, so very fine lines and small text blur over the years. Designs with clear outlines and some solid black hold up best. Sunscreen once the tattoo has healed makes a real difference here, because the front and sides of the neck are almost always exposed.
Side and throat tattoos are visible in almost every job and are hard to cover with anything but a high collar or a scarf. Many artists won't tattoo the neck on someone without other visible tattoos, and treat it as one of the job stoppers along with hands and face. A small nape piece is the more forgiving way to try the area.
Healing is fiddly. Collars, scarves, necklaces and hair rub the fresh tattoo, and you turn your head constantly. Wear open necklines for the first couple of weeks, keep hair products off it, and try not to sleep with that side pressed into the pillow.