Let's go for "Attractor Patterns"... Anything that doesn't try too hard to imitate a natural food item. Mickey Finns, Royal Coachman, Parmachene Belles, or any other non-realistic fly will fit. This way, you can tie wets, drys, streamers, nymphs or any other type of fly.

I will probably go with a colorful classic style wet fly, or a bright streamer of some type. I'll browse "Forgotten Flies" until I find a pattern that stands out.

If for any reason, Attractor patterns isn't okay as a theme, then I'll use "Streamers" instead.

Thanks,
Dave