Out of plot, aesthetic, and characters, what do you think is the most important/your favorite part of a story, movie, or game (or any other artistic medium)? Do you think they need to operate together to form a cohesive work? Do you think that something else is more important.
In written works, I think that characters are the most important (See: Nick Hornby), but for games I usually put aesthetic first, then characters, then plot (See: Yume Nikki). For movies, I can go for either aesthetic and characters (See: Chinatown) but sometimes just good writing and plot do the trick (See: Network).
There are obviously exceptions to these rules.