First of all, he is an excellent teacher. He taught Naruto and Sasuke a particularly important thing, that is, the so-called "fetter", which is also one of the themes expressed in the whole movie. In the film, he eliminated many students before being called the teacher of Class 7. He seems to be a gloomy and heartless teacher.
In addition, he gave students a lot of care. When he learned that Naruto's family had been eating instant noodles and expired milk all day, he gave Naruto a lot of vegetables and advised him not to eat instant noodles without nutrition. He didn't feel confident at first when he saw Woody Sakura, so he deliberately didn't tell them that three people had to submit their applications together to qualify.
After Sasuke rebelled, he got the strength to prove to Kakashi that he had surpassed the teacher and wanted to get Kakashi's life back. (At this time, Sasuke accidentally injured Woody Sakura), he still did not forget Dundun's teachings and told Sasuke how important the fetters of his partners were. He just hoped that Sasuke would not go astray and turn back.
Second, he is considerate to his friends. Although Kay's teasing route is not in line with Kakashi, the confrontation and friendship between them grew up. In those days, in order to prove that he could surpass genius, Maito Gai constantly confronted Kakashi, and the result was that he lost and lost (as a teenager). Kakashi was very sad when he saw his failure, so he simply played a small game of rock, paper and scissors with him, and later many strange duels were derived, which lasted for more than ten years.
When Yamato first entered the dark department, Kakashi told everyone that there was my guarantee for his strength in heaven, just to let Yamato fundamentally lose his past as an "A" and then integrate into the new collective life, so that he would never be lonely again, have a real partner and find his own home. The above is purely personal!