Why Kakashi preferred Sasuke as a student over Naruto ?

[00Rinne]

He was told by the sannin toad sage Jiraiya to help Sasuke with mastery of the sharingan while he taught Naruto how to control his bijuu.
& Kakashi was the only capable shinobi of training Sasuke to mastery his doujtsu.

 

[Heisenberg Wannabe]

Naruto had trouble summoning a tadpole after 2 weeks of training, and Jiraiya had to throw Naruto off a cliff to force him to use the Kyuubi's chakra to summon a big toad.

Meanwhile, in 2 weeks Sasuke started using his 2nd nature element ,and developed it enough to master the Chidori + Attained Lee's High speed Taijutsu which took Lee years to achieve. All this while dealing with the Curse Mark, and having to think about Orochimaru being after him.

Yeah if it was Kakashi training Naruto, he would've been the one to jump off that cliff. One gotta be patient with the likes of Naruto

 

[Naruto X Hunter]

Yeah if it was Kakashi training Naruto, he would've been the one to jump off that cliff. One gotta be patient with the likes of Naruto

Yeah, even by 16, despite it being his main technique, he didn't know that he could gain all the knowledge his clones have once they disappear, or that he could use clones to shorten his training time, and he didn't even know what nature elements were until Kakashi told him.

 

[GT Is Not Canon]

Combination of similar personalities and probably guilt over obito and last uchiha left kind of thing