I really like this casual menswear look. A brown sweater, jeans and scarf are a really great combination; the brown in the top is the perfect colour for this time of year.
A dark denim is just about the mainstay for me at the moment as are the boots (which I seem to be wearing with everything).
There's not much more to say about this ensemble really, it works because it's simple and smart, it's just a matter of finding the right colour combination that suits you. Come the summer, you could revisit a similar look but rather than go for a heavy fabric and colour scheme, try a lighter linen with bright colours. >>