Good essay writing topics are feasible. If you are planning to conduct even a small research, then you should be able to apply research methods that are acceptable. If you can do this, your topic is feasible. Be practical. Can you find enough resource materials? Can you conduct experiments?
It is important the topic is popular and interesting at best. You should evaluate your essay writing topics whether it will appeal to the readers or not. But the first thing that you must do is to ensure that it appeals to you. Then you can expand your evaluation by thinking of the possible audience for the essay