I keep hearing that we should use well aged compost. My question is, what is considered to be "aged compost?" I make my own and I would think it's good as long as I cannot recognized the contents.
Usually the term "well aged" is applied to manure or manured compost. General recommendation for them is 6 months. But using that label for non-manured compost, I'd agree with you - cannot recognize the contents and with no "off" odors.
People that use the term "well aged" compost are confusing that with finished compost, or they are confusing "composted manure" with compost.
You should use finished compost, not material that is still digesting, in your garden, and even the "composted manure" sold in the stores would be better if you composted it with more vegetative waste before putting it in your garden. But "well aged" compost may not have any nutrients left in it depending on how it was stored while "aging".