1. He’s in the Navy people! In the Napoleonic era! If you want to know why that is so awesome, I suggest reading the Horatio Hornblower, Ramage, and Master and Commander series.
2. Dick Musgrove was clearly a pain in the rear, but Capt. Wentworth made a point of trying to help him. Even after Dick died (and clearly from his own stupidity), Wentworth is kind to his parents and doesn’t disparage the memory of their son.
3. He is the balance to Anne, she is a woman of thought and he is a man of action.