As all of you have said, growing and eating your own vegetables is a pleasure not to be surpassed!
However, I'd like to mention the pleasure of sharing. We plant so much more than we could ever consume (and we consume a lot!) so I take the excess to the local food pantry where folks who don't have the space or the physical ability to garden can get fresh, clean, good vegetables. Just walking in with a couple of baskets of squash, cucumbers, sweet peppers, whatever is in season, and seeing the instant smiles on the elderly faces is such a pleasure. If you have extras, please share with neighbors, the elderly, shut-ins, or take the excess to the local food pantry (but check first to see if they can accept fresh produce from local gardens--some localities prohibit this for health reasons).
As Bootsy said, the enjoyment of growing doesn't diminish with time. Nor does the enjoyment of sharing.