DH hardly ever wears a tie, either. Dressing nice does not necessarily entail a suit. The only times he has worn a suit in the past 10 years have been interviews, weddings, funerals, and occasional fancy parties/dinners. He has not had to wear suit to work since the early 90s.
He wears really nice jeans and wool pants, and only wears chinos without pleats. He wears short sleeved button down shirts in checks and prints in the summer and sweaters in the winter. He also wears what women would call capris in the summer, with tee shirts, when not working. Mostly denim. Very popular for men in Europe and still get stares here.