[member="Darth Valdra"]
Different characters appeal to different people. That said, you can aim for a specific demographic to increase your chances of a successful advert.
To explore. Age is one such category. For instance? Teenagers like things that are powerful, sudden, flavorful, and sexy. Adults like things that are dangerous, wealthy, detailed, and original. Seniors like classics, longevity, authenticity, and the intuitive. You can expand and contract around this idea forever too. Entertainment industries around the world love to use it. Probably too much. Lol.
Personally. Most of my characters are developed with myself as the target demographic. I'm the audience and the play write. I simply build with the knowledge and tools I have at this point in time. If it's entertaining to me? Welp. It's good enough. Now? Seeing how my characters are received, (or simply perceived), is always a delight. Some people like it. Some people don't.