I always like to point to Maslow's Hierarchy of Needs when I enter conjecture mode.
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A simple way of putting this diagram is that this is what a human needs to fulfill in order to attain happiness. A furry's identity (the top of the pyramid) is tied to their dumb fursona, and thus they have a basic psychological drive to express their identity in order to attain some form of completeness. However, you cannot be happy unless everything below the pyramid is fulfilled, as the desire to complete the lower needs will override any sense of fulfillment you would feel for attaining the above. For instance, if you're starving and dying of thirst, having a friend with you wouldn't change the fact that you're suffering; in another example, completing an art piece (feeling of accomplishment) would feel meaningless or empty if you didn't also feel like you are meant to be an artist (a sense of belonging).
Despite what he says, Louis' base needs needs are fulfilled, as his family offers him food and shelter. He despises his family, so the furry community acts as a surrogate for his sense of belonging (hence him feeling personally attacked and betrayed during the moments they shun him). Ignoring his suicide baiting, which is clearly done selfishly for pity, Louis feels accomplished in his life, as he would seek to improve himself if he didn't. As a matter of fact, according to his Q&A's, he seems to expressly believe simply being alive is accomplishment enough. Thus the only thing left for him is his sense of self. Louis does
nothing and his personality is nothing beyond being selfish, lazy, and greedy, a personality he most likely denies, thus not fulfilling his sense of self. Therefor his only means of attaining an identity is his fursona, which serves as an explanation as to why he so desperately tries to spend money on commission after commission for his fursona to be drawn.
By extension, this could explain why he regularly changes his alias and fursona. He may realize that he doesn't feel a sense of self yet, although he doesn't understand why. The real answer is that Louis refuses to strive for achieving whatever potential he has, but he instead believes that he is simply unsatisfied with his fursona identity due to him lacking the ability of metacognition (realizing why he thinks or feels the way he does). And, as he believes such, his attempts to regularly change his fursona and the name attached to it is a feeble attempt at correcting a problem he just can't pinpoint. Since he only knows how to attain a sense of self through his fursona and he realizes (although perhaps subconsciously) that said fursona isn't giving him that sense of self, he changes his fursona constantly as an attempt to rectify it. This could also serve to explain why he even bothers claiming to be transgender to begin with; he doesn't express the autogynephilic traits other trans lolcows do, which leads me to believe this is yet another attempt to form an identity due to his older one (being a male) not giving him any sense of self.
Great. He backpedals on claiming to use it for "just music" and says he instead needs it for coloring and writing on the go, despite never leaving his house. Who does he think he's fooling? And that attempt at pity because he fell out of your chair onto his soft, carpeted floor is just pathetic.
You've got to be kidding me.