I have, and I've bought fantasias just to tweak minor details. But there's been times when I logged in and played for a while and then realized I just wasn't feeling the changes. You can choose between different areas with different lighting effects, between day or night, and twist your camera around to different angles while in the character creation screen, but sometimes the only real way to tell if you like the results is to see your character in action or in all its current glams, etc. in game.