Opinions on random CSS

[Dave]

I am designing a site that is going to be based on railroading.
So I thought it would be a cool idea if each time you loaded a page it would randomly select a CSS sheet from a list.
The only difference in these style sheets would be the color scheme - it would randomly change to different railroad color schemes (I.E. CSX (blue, yellow, grey) PRR (green, red, gold)) I could add as many as I want.
I also thought if I got enough coding knowledge I might be able to put in a selector so a person could set their favorite one or leave it to random.
Any opinions on this? Trying to keep to good design etiquette.

[Charles]

As long as the random selector can be turned off by the user, and the color changes aren't ridiculously drastic, i'm sure it'll be ok; it's hard to know until you see it. And many sites have it so that you can select different styles, especially forums (just look at the bottom left of this one!).