Mine are 21 and 23 , I only did stockings in the early years when DD would sleep in DS room on an airbed and they woke up at 5am with their stockings . We could hear them whispering , trying to be quiet and unwrapping ( Stocking Gifts were wrapped too)
Mine have a Dec 1st Box (underwear, stocks, pyjamas, loungewear , robe every other year, jar of sweets , Selection Box)
I used to make a Beauty Advent Calendar for DD which formed part of her presents but it got harder after 4 years to find things so I did a Beauty Box last year which she loved too
Sometimes the Stocking Gifts can be more like 'proper' gifts .
Box of pencils from hard to soft for graphic design
Guitar picks
Some mens' skincare
Fancy whitening toothpaste
One of those LabyBird Books for adults (Zombie Apocalypse type)
DD will tell me what she wants as main presents but I have free reign with her Beauty gifts .
Nail polish , lip balm, cuticle balm, eyelash serum, facemask, hand and footmasks , She has a Sock Advent Calendar (bought in Feb 
Not buying Chocolate Advents this year but they'll get Selection Boxes