I like Immortal he or she seems like a nice person. Octo too for that matter, he just tries to move back and forth and shoot people however he can 🙂
It just wouldn't be the same if we didn't have all these different types of players and everyone just played the same style. I know Octo's style isn't really CTF but it's not completely inconsequential.
I should get the other skins working again they kind of exemplify the different behaviors. Would you look at Octo the same if he used the WarCow skin? 🙂 Okay, probably you would but it would still be funny.
Why anyone decides to play the way they do is hard to understand without having had their experiences. An interesting but deep subject to try and understand behaviors of others: https://en.wikipedia.org/wiki/Game_theory
A probably poor synopsis: Each person decides and has their own optimal strategy.