Ever since the Moonswatch came out, I've been talking about how a customisable F1 quartz series could do well - easy enough to have the option to mix and match your case, bezel and strap colours. Dials too, realistically - it would be easy enough to have a selection of all 4 options with the dials/movements ready to be fitted in the selected case and then bezels and straps attached. This could even be done in-store, and you could have pre-selected combinations for things like a country's flag or Formula 1 track locations etc.
Personally I don't like the original F1 nor the later designs with the hard rubber inserts/crown guards (I do like the modern designs, especially the Senna edition with the Legend bracelet) but a customisable colourful option could certainly be a gateway to more watches for many people.