Emerald is the color for a 20th wedding anniversary. Normally, I would ask for emerald colored items. However, green is not a well supported color in DDO. Therefore, I am asking for things that will be easy to mix and match with existing items. Black, white, and silver go with almost everything.
This list is mostly for myself. Some people only care about another +1. That is fine. I am not in that camp, obviously.
I limited my suggestions to items that are easy to produce. If you have the time to create a brand new outfit or steed, great!
Smokey, translucent black dragon wings, like the ones from Year of the Dragon: This item would match lots of outfits already in DDO.
Butterfly wings with a black interior and silver outline: As above.
Robe of Moonlight (Myth Drannor) in black and white, silver and white, black and silver, or black white and silver: As above.
(Since DDO does not have a clothing dye system, offering existing outfits in new color schemes is very easy way to create new rewards. In my opinion, you do not take advantage of this nearly enough.)
Any reward box should include the option for a Quiver of Alacrity. While not very important to me (I have 9), it would be a really nice gesture for all those players who missed previous opportunities.
A level 20 Gold Seal hire would be really fun. I pick level 20 because that offers the most utility (20 to 29) for players behind the curve. Level 30 also offers a lot of utility, especially as the game grows. A rogue that works from 20 to 29 would help many players. A healer or kobold shaman are obvious choices. I would also enjoy a neat creature like an ankylosaurus or griffon.
I would enjoy a plain white horse or plain black horse as a steed. A plain black therapod or plain white therapod would also be great. Again, I choose black and white because those colors match almost any outfit.
For the +1 crowd, a tome of +4 to +5 skill may have appeal. (This item offers very little power creep but does get a character closer to finished.)
A low level propulsion item, like the Cannith Boots of Propulasion. This is not about need. It is not even about advantage. I like zooming around for the fun of it.
A cosmetic item box breaker. This is totally about convenience because I play dagger rogues. I want a piece of cosmetic equipment that, when activated, breaks all boxes in a radius. It needs a fairly fast cooldown.
Anniversary d12 enchanted with Greater Teleport.
I gotta get to work.
Merry Christmas!