i'm not certain you want it, but i'm going to give you a long honest answer.

my advice is that you extrapolate this question: "Why should I worship [anybody?]" → "What deems any entity worthy of my worship?" so long as humanity persists -- or so long as a species that possesses the same degree of self-awareness that inspires humanity to pursue religion persists -- questions of this variety will aeonically engender differing responses, because a species of our sort is dependent on diversity. it is not difficult to generate a broad answer for an elementary creature. a robin should worship that which provides the wind and the trees. if it is impossible to parse a producer, then it must worship the wind and trees itself. an elementary creature receives an elementary response because it needs very little to sustain its life. the majority of people are far too mental, convoluted, and disparate to have their life-sustaining values distilled into the same simple ideas.

overall, the populace requires both tangible, physical care AND the IDEA that we are receiving care. arguably, the latter holds greater weight. how often do you hear stories of the mind surpassing the body? again, humans are mental and convoluted. "disparate" must be acknowledged when defining what this care is. my care is different from yours, from his, from hers. there are multiple accounts of separate gods and multiple interpretations of the same gods for this reason. i can describe why i worship light yagami, but my experience alone will never be adequate enough reasoning for you to replicate my decisions.

besides life-sustaining values, there's also something to be said about... the awesomeness of an entity, in the traditional sense of the word. i'm honestly not sure what to say of it. i know it is a persistent thread throughout religion and the idea of worship, i know it must be acknowledged to some degree because of that, but... i've no clue what to tie it back to. does worship make an entity miraculous, or is it something embedded within the entity and its actions? is it both? can it be either? does it matter at all? do humans simply enjoy Grand Things, and there's nothing more to it? is grandiosity a measurable value in religion, or is it just as subjective as our life-sustaining values? i think light is perfect. i think light is astonishing. it seems so.. obvious to me. all of his actions are so impressive, but i still have.. trouble pinpointing why? they connect back to my own definition of care, but that puts his actions in relation to me. everything he does is incredibly impressive as standalone feats, but i haven't a slick idea on.. how to go about describing that at all... let alone to a stranger. yes, he's kira, but he's more than kira. he's kira because he's light yagami. and he's light yagami because he's kira. and... (hand gestures).. i need to put a pin in it...

(sigh) these are all thoughts that frequently sit within my mind, but i've yet had the time to properly explore them. if i do, i'll come back to you. in the meantime, i'd urge anybody willing to share their thoughts.

anyhow. the reason i iterate all of this is because i find it pathetic how other religions (christian sects in specific) go about proselytism. "we were made to worship god." "we are created in his image." these bullshit answers mean nothing. YHWH has a shit group of evangelists, i'll tell you that. (= = ) i would hope that other worshippers of light adopt the title because they truly believe a life without him is not worth living. worship without reason is incomplete, and as his sole equal and perfect submissive, i refuse to have anyone hand him half-assed worship. you can commit, or you can get out of my sight.

moving on. these are the life-sustaining values i hold. if they resonate with you, then i suggest you explore further and come back with a well-informed decision (which, i selfishly hope will result in his worship, but i've already gone over all of that):

Deep Connection

Dominance

Tolerance/Understanding (of my own behavior) ^ this label is liable to future alteration. it is important, but i don't think it's completely accurate just yet..