Companies not to work for is a very personal choice based on personal experience except the universal experience of companies that do not pay according to contract. At this point those seem to include Franchise Compliance, Freeman, Goodwin and Restaurant Evaluators. Some companies pay slowly, such as Service Sleuth, some pay quicker, such as Corporate Research International and others. Life is too short to have to chase payments that are due you because companies did not pay according to their promised pay cycles.
Otherwise for almost any company you will find those who like working for them and those who hate working for them but will if the price is right and those who refuse to work for them further. So a whole lot of it has to do with what fits for you. Some folks want quick and easy yes/no surveys, some folks are willing to write brief narratives and some are willing to write what seems to be a novel. As a quick and dirty, the higher the pay, the more narrative you will be writing--but it is only a quick and dirty. I have seen low paying jobs that want a novel and high paying jobs with less than 20 questions and a brief narrative of about 500 characters.