I recently came across the classic example of client that people usually consider high maintenance/low value, During the early stages of freelancing I found these type of audience very fruitful for the sake of reviews and exposure in the market with portfolio, However I have learned we've got to leave them behind as we grow for the newbies to experience. Later on, more value the client brings to you in terms of experience and project outcome, the better for your growth! Are you someone starting to freelance, Let me know if you have any questions!