*open the gifs for better quality <3
Kakashi spins SO MUCH compared to Obito in their fights, but as someone who trained martial arts for many years, I get it, you know?
First of all, Kakashi loves his kicks. It puts some distance between you and your target, you can protect the upper half of your body by leaning back, a well thrown kick can send your adversary flying or staggering back, etc.
The cool part is that Kakashi uses a lot of back spinning kicks. They have more strength behind them because you use your entire body and the energy the movement creates. If you dominate the techniques and you've trained your balance so you won't get dizzy, it's almost expected to use kicking combos.
I'll try to explain?? It's a bit hard, but I want it to be easy to understand for someone who doesn't know how the kicking dynamic works.
There are different parts of the foot you can use to cause different types of damage. It depends on how you're standing and from which direction you're kicking. So imagine you stand with your body facing a side and while you look ahead. Your right foot is behind and you want to kick with that one— you retract your right knee, you bring your right leg up and closer to your body, all the while your left foot starts to shift its position to look back. At the same time you extend your right leg, your left foot shifts. The movement is explosive and your body is now facing the opposite side.
You are already half spinning!
If you don't land the hit, you can always set your right foot down and keep the flow of your body to back kick with the heel or arch of your left foot. If that one kick doesn't hit, you can set your left foot down and... Kick again with your right! Now you're facing ahead again!
The best (like Kakashi) can spin without setting a foot down, basically using the movement to keep them afloat.
I'm making it all so way more simple than it is and the combinations can vary pretty drastically, but as I was saying, Kakashi is a practical fighter and he loves to use every single thing available while he fights.
The reason why he fights so elegantly is because, like in a dance, he uses the flow to move, to guide the fight, to shift the position of his own body and the position of his weapons. In comparison, Obito learned to use more of the movement and weight to counter Kakashi's fluidity.
(I ended up making a bunch of gifs for this post, oops! Better keep going!)
Anyway, I bet I don't have to mention how much Kakashi spins his weapons. There are at least six different occasions during this particular fight with Obito. He loves to spin kunais to change his grip, to exchange hands, he even sent one flying high so he got both hands free to defend himself from Obito and then proceeded to kick it midair to with his heel, so it cut Obito in the cheek.
He's practical, so every spin has a meaning. Back at his fight with Zabuza, Kakashi even used the spin with his summoning scroll to intimidate... I think (I can't remember clearly).
You can rewatch almost any Kakashi fight in the anime and compare it to this post. You'll see that he is the spinning king for a reason.
