Is it normal that i have arguments in my head?

Yes, this is normal - you're fighting with your conscience. Happens to me all the time For example, when there's just one night left to do homework and my conscience says "do it" and I think "no, I'm bored, I just want to play on the Wii, I'm sure the teacher won't mind..." and then my conscience says "she will mind, you'll be behind on coursework." and such.

I find it interesting to read what others have said. I can look at differing perspectives in my own mind, but without feeling like there are different characters or personas having a debate. That said, when I was an adolescent, I often felt like my emotions would try to stifle others, with each of my feelings vying for dominance. I dissociated by habit because of violence at home. I presented different fronts to different people - I wasn't lying and wasn't pretending to be anyone I wasn't; rather, it was a case of, I allowed different aspects of who I was to be emphasised depending on the situation and environment. No one ever saw the whole "me". I wonder whether these different characters in your mind are similar in the sense that you're not completely sure of who you are, or perhaps you're not completely comfortable with who you are? These days I am who I am, regardless of who's around and I'm okay with it. Do you think maybe you "wrestle" with these different aspects of yourself because you're not completely comfortable that you have darker thoughts at times?

Sure. Lots of people do that. It's a good way to look at more than one side of a question, and turning the viewpoints into characters makes it easier to keep track of who said what.

It doesn't mean you have Multiple Personality Disorder or a dissociative disorder. Those are far bigger, hairier, and more obviously pathological.

Never pick sides you have nothing to do with it lol. Listen to both sides and come up with your own response

Yeah I love arguing if noone is up to it I might argue withmyself

Yep its the most normal thing in the world nearly everyone does this.

i do this like, all the time

look up bicameralism (did I spell that right? I always mess it up cuz I think of spelling "camel"), but yes there is the theory that at one point in human evolution everyone or quite a few people at least heard voices in their heads, but yeah even if thats not true you can have a couple viewpoints going on at one time, and on some hallucinogenic drugs you can experience arguing with like three other viewpoints within your own mind, its completely normal and healthy I think, it helps you evaluate your own thoughts and have a devils advocate to keep yourself in check

The concept of yin and yang originates in ancient Chinese philosophy and metaphysics, which describes two primal opposing but complementary forces found in all things in the universe. Yin, the darker element, is passive, dark, feminine, downward-seeking, and corresponds to the night; yang, the brighter element, is active, light, masculine, upward-seeking and corresponds to the day.

Yin and yang are complementary opposites rather than absolutes. Most forces in nature can be broken down into its respective yin and yang states, and the two are usually in movement rather than held in absolute stasis.