When it comes to formal occasions, you have to look not just sleek, but Men in Black sleek - perfectly ironed shirt, black suit, solid-color tie. This means that your watch has to follow the same guidelines. Boasting an elaborate Rose Gold mesh band would probably look pretty ridiculous with a snow-white shirt and a black suit. In such cases, you have two general options.
If it so happens that the office you work at requires formal attire, you'll have to stick to cleaner looks. However, unlike in the case of a white-tie event, at the office you're allowed a little more wiggle room. So, don't hesitate to make that watch pop with something flashier, but still classy.
You can go nuts here. There are just as many watch bands, as there are T-shirts in the world, so finding a good pair of the two is not that hard. Not to mention that you can choose from all sorts of materials and looks, and you are free to make your watch the centerpiece of your whole outfit.
No matter what kind of sport you choose, you will sweat, that's a given. And while the Gear S3 might be able to handle it, the same can't be said for its band. Rule number one is to never wear a leather strap in the gym, unless you want it ruined in a few weeks time.
Let's not forget that smartwatches have one primary purpose - to tell the time. And we need that every day, not just during work, or special events. This is why we need good options for everyday use too.
There you have it. You're now set for every possible occasion. And remember, the smartwatch is not just a gadget. You'd be forgiven for showing up in a black suit, sporting a red phone case. Boasting a red silicone watch strap will not go by unnoticed, though.