I'm all about these kind: Men's Solid Crew Lightweight Lifestyle Sock.

While sure, big thick colorful hiking socks have their place...but for city folks who go to desk jobs, these are your day-to-day excellent work approved (black) and also casual (gray) style that can work with both your brogues and your sneakers.

Warm enough for all but serious northern winters, and light and breathable for Spring and Fall. For summer, switch to cotton though.

I watch all year for sales, and can find them more in the ~$13 range.