When I think about it more, I think vivid colors are important for me. A couple of cases in point (though these relate to computer games):
Command & Conquer: I never played the first C&C and started in this series with Red Alert. I liked Red Alet and preferred online multiplayer. Red Alert had vivid colors. Then Tiberian Sun came out, which I got pretty quick. The problem with Tiberian Sun is that everything was kinda dark and dreary, being that it was set in a post-apocalyptic future. I tried playing this game, focusing on online multiplayer, but every time I played I'd get really sleepy and my mood would lower, making playing very difficult. Then Red Alert 2 came out (never got Yuri's Revenge, though), which was the last C&C game I played. It brought back the vivid colors and I had fun for years playing online multiplayer with it.
Final Fantasy VII: My first Final Fantasy was IV, followed by VI. I had some difficulty adjuting to VII, but was eventually able to get into it. The biggest problem for me was how you spent usually ~6 hours of gameplay in Midgar for the start, having no access to the overworld until you completed it. Of the Final Fantasies I played (IV-IX), this was definitely the one where you had to wait the longest to get into the overworld. Midgar was such a dark, gloomy place, so I had the same problems with sleepiness and low mood resulting from the environment. Things picked up once you can get out into the much more colorful overworld, though (and you can look back at Midgar and see how gloomy it was)! Whenever I start a new game of Final Fantasy VII, I always look forward to getting out of Midgar. Even so, I generally liked the game.
Now dark and gloomy isn't always bad: For some reason in Chrono Trigger I could handle 2300 AD just fine and in Final Fantasy VI I could handle the World of Ruin with no problems. Now these games were 2D, as opposed to the 3D games mentioned above. Following up on that, Rainbow Road in the original Mario Kart (SNES) never gave me any problems, but whenever I played the Rainbow Road in Mario Kart 64, I started getting very sleepy, felt weird, and had difficulty focusing. (When I was at summer camp in the late 90s, there was a night where we had loud music and lots of flashing lights: This tended to make me feel very sleepy and weird and have difficulty focusing, too.)
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"You have a responsibility to consider all sides of a problem and a responsibility to make a judgment and a responsibility to care for all involved." --Ian Danskin