I clicked on this due to the fact that recently two things of note related occurred. 1. A new local friend presented me with a couple bottles of some very very strong, and very rich, full-bodied mead, and 2. I've been playing with oak and glycerin.
For the most part, I've enjoyed my own meads very much, even the strange experiments. Age hides many sins, and indeed, if one does not admit to that weird flavour being accidental, a few months or year+in bottle will make that weird flavour into "character" "depth" "full" "rich" or at least "interesting and unique, can I have some more please?"
Taking chunks of used wine barrel staves, crosscutting them into 1"-2" bits, splitting those and "toasting" them with a torch, then dropping those into carboys, growlers, bottles, decanters, etc. of various wines, meads, beers, for various amounts of time has yielded some rather interesting and luscious results. In fact there are three such chunks in my glass now. By itself, the oak adds a sense of body, and a lingering "something" I'm not qualified to try to express. Strong at times, but I've never actually felt that I've over-oaked anything. Yet. Under, for sure. But that's OK.
Also, being a maker of wild blueberry and huckleberry wines, I have at times found that the perceived body is lacking. Oak helps, but so too does glycerin. This, I have overdone. Best to take one's time with it, as if you mix some into your wine or mead and take a taste test, your palate will be skewed if you adjust and taste again soon. Best to wait. This is one thing that does not seem to mellow with age, as far as I can tell.
Together, oak (with my version of "toasted" which is more of a "burnt to a crisp in some spots, barely browned in others") and glycerin seem to have made some very interesting and amazing results.