My dad, who is 72, has this same issue. Only he sells whatever he finds. Then it bites him in the butt as he is always struggling to find things in the game so that he can do something else. Like in Fallout, he looked for a Pressure Cooker for hours as he had found all of them and sold them before he knew that he needed them for something.
At least you keep the stuff so you can access it later.
I, too, sell off everything I don't need, however as I do a ton of crafting I keep a mental list of what's used for that and don't ever sell those items. Of course, I eventually end up with enough such items to open my own general store, since I pick up everything not nailed down and would take those too if I could.