I agree. Kakashi likes Naruto well enough, but they are too different to get along really well. I don't think Kakashi really understand's Naruto's trauma the way Iruka does. Iruka is really a better replacement father than Kakashi for Naruto because he understands him and is better at supporting him and cheering him on. Kakashi knows that Naruto has Iruka, but Sasuke only has Kakashi to look after him.