英俊 (yīngjùn) describes a man's handsome, dignified, and refined appearance — it suggests a classic, mature handsomeness with an air of talent or nobility. It's more formal and literary than 帅 (shuài), which is the everyday word for 'good-looking' and can also describe cool objects or actions. 俊 (jùn) is similar but shorter and more literary; 俊俏 (jùnqiào) adds a lively, charming quality, often for young people.