I think it's best to avoid beginning working with a client if you don't think you'll have an enjoyable, productive relationship. If you start having problems with an existing client, the best thing is to communicate openly and clearly about the problems and try to solve them together. It's important not to write them off as a "problem customer" but to give them a chance to know what isn't working and to solve it. If you're not able to work things out together, then it's time to part ways.
I think it's best to avoid beginning working with a client if you don't think you'll have an enjoyable, productive relationship. If you start having problems with an existing client, the best thing is to communicate openly and clearly about the problems and try to solve them together. It's important not to write them off as a "problem customer" but to give them a chance to know what isn't working and to solve it. If you're not able to work things out together, then it's time to part ways.