As a buyer, pictures are VERY important! I won't even look twice at a house without enough pictures. I want to see the outside and the main rooms including the living room, dining room or eating area, the kitchen, and the master bedroom. If just one of these pictures is missing but the size of the missing room is listed and I really liked the other pictures, then I'd still see the house in person. Of course, the more pictues the better. There are so many properties out there so I rely on pictures to decide which ones are worth my time and I will go see in person. There are just too many properties out there to waste my time on the ones without pictures.
Having a lot of pictures can be beneficial for the seller too, because as a seller I know what a pain it can be to prepare the house for a showing, so I like knowing that the people who are coming to see the house already liked what they saw.
If there are no pictures of the inside, I do tend to wonder if something is wrong with the house and just assume it must be really ugly inside. It has crossed my mind that there might not be something wrong with the house, but maybe the sellers don't want to put pictures up. If that is the case I feel that those types of sellers are probably hard to work with because I'm sure their realtor told them about the importance of pictures and they are being hard headed or there is something wrong with the house. Either way, no pictures lead me to assume there is either something wrong with the house or the seller so I just move on to the next house.