While most businesses cannot be picky when it comes to choosing their clients, I can say from my personal experience that there are simply some clients out there I love working with and some that I like less working with. There must be a reason why there are people out there who are my less favorite clients. It really helped me to think what it is that makes me like working with somebody. I made a list of my clients where I clearly stated why I like working with them. It turns out that I like working with those who buy from me more. I know the reason this happens. Those who buy more often from me and in larger quantities are not those who waste a lot of my time. I do not usually like to deal with people who waste a lot of my precious time, so this is probably I enjoy dealing with only those who are going to buy from me for sure.