Jeans are the most versatile pants ever. They can be the most casual, or when dressed up can go smart casual, business casual, and all-around dapper. You can mix classic denim with pretty much any other fabric or color. I mean, if you wear them all the time, your outfits can become predictable. I’d recommend owning a pair of at least one other type of casual pants, like corduroy or chinos, to keep your winter wardrobe versatile. These are also good if you are attending a business casual no-jeans event and don’t want to wear dress pants.
Here are some Qwear submissions with good examples of smart casual jean outfits: