For the most part, I'm with the Duck on this one. I certainly won't care, and my loved ones will have more on their minds than knives.
That doesn't mean that I haven't thunk about it, however, perhaps because of my personal life experience. My mom battled cancer for nearly 2 decades, from the time I was in high school, until she passed when I was 35, my entire adult life up until then. To say that this was something that shaped my life would be an understatement. After she passed, I found that she had left a detailed spreadsheet of her important possessions; complete the with value, history, and importance of each item. Now, try as I may, I am nowhere near as thoughtful as she was, but I have considered which of my possessions might be held dear by my children.
I'm 44 now, with three kids (16 yo son, 16 yo daughter, 18 yo daughter). While I am in above average physical condition, I am not without my share of health issues to say the least (one kidney, history of Traumatic Brain Injury, some things the doctors are currently checking into, etc.), and I have had plenty of brushes leaving me no stranger to the idea of my demise. While I don't think knives are really all that important in the scheme of things, I do think some of them could make nice keepsakes to hand down. So far my eldest is the one most interested in knives, and my son is an outdoorsman at heart so I know he won't be far behind. I think my CRK's would be the ideal choice for a knife to pass down as an heirloom to them. Beyond that, I think my Case knives are well suited. They are small, not worth selling anyway, most of them have a brushed finish I put on myself, and I think they could make for nice little tokens of memory. They can sell the rest, or none of them, or all of them for that matter; I would never want them to feel any guilt or obligation over my possessions. As long as they go out there and live life to the fullest and think of me from time to time, perhaps while watching the sun rise or set as we have often done together, I'm cool.