Yeah I think Kakashi likes all of his students very much, and wants the best for them. However when it comes to how much he can relate to them personally, Naruto and Kakashi are just too different.

Naruto is loud and brash and highly eccentric, which is very much like Jiraiya. Very powerful personalities, which lend well to the humor of the show, along with examples of absolute determination.

Kakashi is quiet and reflective, a bit somber (perhaps because of the tragedy that befell his original team, which he feels responsible for). Kakashi and Sasuke are just more similar, hopefully Sasuke will learn from Kakashi's example of rising above rather than turning purely to the dark side for his ambitions.