How come Sasuke never used Genjutsu on Naruto in any of their battles?
Despite Sasuke clearly leaning on it[genjutsu] progressively more as a strat the stronger he got as a shinobi, it seems the one person he absolutely refused to use it on, was the person he most wanted to defeat in battle according to him [excluding Itachi], so why didn't he? He knows Naruto was never the Genjutsu type, so he could have easily caught him in several of them, effortlessly. Its not like Naruto had exhibited a Killer Bee-esque resistance to it, or level of ease breaking out of it, so it was always 100% on the table. Hell, he even used it on Itachi, who he KNEW was superior in ocular genjutsu [Tsukuyomi], and he had to presume that he was resistant to it as well, being he was very skilled using Genjutsu himself, and always had a superior version of Sharingan, but knowing all this never stopped Sasuke from using it on him, lol. He even used one on Sakura at the end of the series to stop her from chasing after them to the FV prior to their final bout, and it was told that Sakura had an innate affinity for resisting and potentially mastering genjutsu herself when they all met as Team 7 squadmates, when Kakashi lauded her chakra control. Maybe it's the fact that him and Naruto are such rivals, he finds it beneath him to resort to such a technique? It's weird though, because Sasuke is a technician, in every sense of the word, and is huge on strategy normally- he typically does whatever it takes to seal wins, barring him crashing out at the 5KS