If the main character goes, be sure to have at least a somewhat important character appear in the story quickly. And, at that point, that character should be one that has similar skills. For example, if a great accountant dies, and he has a son-in-law that is in the same company, for example, try to have it so that circumstances make the son-in-law either reluctant to accept the new position, or something similar to that effect.
In my current story, death is going to come cheap when it does decide to come. In real life, people don't get glorious or dramatic deaths (at least, not most of the time) and despite magic themes, my story is pretty grounded in real life concepts.
My favorite death in fiction is from the cartoon 'Fritz the Cat' when the crow that has been riding around town with Fritz gets shot randomly during a riot he isn't even involved in. The death scene takes over a minute as he kind of slowly bleeds out. Something about that scene gets to me every time.
I think the quickness of death is a really striking theme in literature as well. The series Mortal Engines by Philip Reeve uses this very well. As a reader you become fond of every character, but none of them gets a 'glorious' death and it's very frustrating and amazing. I'm sure your story will be great!
Everyone dies, and main characters are no exception. There are books that simply end with the main character going on and living happily ever after, but a series of books that actually shows the main character dying goes the extra step. You are seeing you character's progression from the first moment you see them to the last when their casket is being laid to rest. This is the ultimate example of character progression because they take their traits with them, and they can possibly pass their burdens and legacies onto someone else a la Batman, or simply end it all, taking their role to their grave. If you intend to kill off your main character, it should be at a point where your audience can get to know the character well enough to have a feeling of familiarity that will cause remorse or sadness to see them go. Hard to get right, but so satisfying when done so.
My main character will die. I have an idea of how I want him to go, since he has been close to death several times due to the nature of his job, but he has some more time in him. When he goes, it will be in the most important conflict event I have ever written.
oh yeah the main character in my story is going to bite the dust. not that he existed in the first place, just being a bi-product of a fantasy. i think its neccessary if thats how it needs to end, but sometimes there are better endings
I don't mind it as long as it's subtly for shadowed, I don't like it to be a complete surprise.