agree with your comment, but to be honest, I'm not sure there's any Swatch I would wear: which model would you choose if you wanted to dress business casual?
Ok, I can give you a Skin Irony, but then you would be paying +200 for a Quartz, why not buy an Orient Bambino or a Hamilton Khaki? much better bang for the buck.
Not to mention the clicking noise of a Swatch quartz. In silence, it drives me nuts.
The most understated watch they make is the Swatch Pay!. Super useful, never fails.