I've been playing DDO since launch and I played the LOTRO free trial for the first time last month. There is one feature that stuck with me as an absolute must for ddo. That feature is outfits. There are many discussions pertaining to the issues of duplicate looks in ddo, like this recent thread here:
http://forums.ddo.com/showthread.php?t=253849
I will leave the discussion of why we need it for other threads, but I thought I needed to post this so those who haven't played lotro can revel in the intelligence of the solution. For lotro newbies I'll go over the main features
1. Each player has an typical equipment page, but with several items that display on your character. Each visual item has a small box next to it to toggle display (much easier than /showhelmet on/off).
2. Each player also has TWO outfit pages. An outfit page can be equipped with any items that fit into visual slots. Any item equipped to an outfit slot is equipped with no effects or stat bonuses. Instead the bonus is applied from your equipment page for that slot.
3. Any item equipped to a outfit slot stays in your inventory so that it can be used again in another outfit or as equipment. However, any outfit slot remembers what item you placed it in regardless of what you did with the original item afterwards. Bank it, sell, or give it to a friend and the outfit slot will stay the same until you replace it. At which time you will receive a warning.
4. Any item equipped to an outfit slot can be toggled by the show on / show off boxes just as in the equipment panel. An outfit with an item toggled off will show the item from the equipment panel instead. Unless of course that item is also off in which case nothing will show.
5. Players can switch between equipment, outfit 1, and outfit 2 on the fly at any time. Key binding can be added for switching.
6. Lotro has several items (some you can buy from vendors) which are outfit only. These are all just cool unique looking items that have no stats. They can be purchased and set in an outfit and then given to a friend for their outfit. DDO could add some low level vendors, but could also drop these as rare or expensive bound loot. They could also be added as an option for guild airship vendors. Personally I would like to see each guild of high enough level allowed one outfit that they can texture themselves so that we can have guild uniforms.
7. This last point has come up before for ddo, but in my opinion is the least important of all 7 features I've layed out here from lotro. Equipment and outfit items in lotro can be color dyed.
With all the influx of development I hope that we can get the devs to spruce up some unique character looks soon rather than adding more adventure packs that no one plays. I for one have quite a few armors and helmets sitting in the bank that I would like to show instead of my boring dragontouched armor that I use on every toon.