Hm. Perhaps I was thinking in a one-sided view. It's difficult for me to find the right words to describe what I mean by "done it all"... I know there's not really levels in this game, there is no end game to this game, it just goes on and on. To me, it seems there's a-lot of things to experience in this game, and that once you've accomplished all of them, then it seems like you've accomplished everything there is that you could possibly accomplish.
Thinking on it after seeing some of your responses, especially Phaens response..I suppose I hadn't put much thought into this. There's different experiences for all of us to have that can be different.
Take killing a simple bear for instance; To someone such as myself or a newer player..we could see them as viscous, terrifying beasts to attempt to take them down in the game. But older players such as most of you who have commented in this thread, killing a bear could be a walk in the park for you.
I suppose I really didn't think about how others could have different experiences and that for me, being at the proverbial level that you all are at could be the "end game" that I believe in.