A couple of minor things I'd like to see:
-Having your weapon sheathed while out of combat (Presumably, there'd be different locations such as a dagger being sheathed at your waist). Just kind of awkward to see everyone with their weapons drawn in a friendly inn.
-This is a personal, selfish request, but if you include pets PLEASE I BEG OF YOU FROM THE BOTTOM OF MY SOUL can a silver (or platinum, somewhere in the "Light metallic grey" area) be included? Ever since DragonFable, I've had a Silver Dragon (Appropriately named 'Silver'), and when the Founder's reward in AQWorlds was a platinum dragon pet (Close enough to silver), I want to keep that as a constant thing about my character.
-A follow-up, having pets be more than just fancy cosmetics: whether they help out in battle, let you take care of them , or you can have a pet battle mini-game, I think it'd be cool if you had the option to get attached to your pet. Especially if it's not just for in-combat bonuses, maybe something like "Pet dragon gives crafting materials if taken care of well enough, like scales or claws." Maybe even not just feeding them now again, could involve stuff like playing with your pet, teaching them new tricks, and other stuff.
---Long story short, I'd love to see a decent focus on pets besides "Fancy cosmetics that might help in battle in some way"
-I'm going to assume it's in the works already, but having a weapon/item preview when appropriate would be much appreciated, especially for the shops.
-Would you consider adding Player houses, or would that be more than limitations can handle? In a lot of other games, they were just sort for decorative purposes, but perhaps they could be fleshed out a bit?
-Another selfish request, for the Blade of Awe (And Armor of Awe, if possible) to be included in some way, shape, or form.
-I'd like to see quests that are more complex than "Kill 10 X's" or "Bring X to Y Location." Maybe I'm just not a fan of grinding, but having different methods to complete quests than "Kill 10 X's" might make things stand out.
I honestly haven't played many MMO's (Not even World of Warcraft much), so I don't know what I could suggest that'd be really unique for AQ3D. I feel like, as long as the game keeps occasional silly sidequests, puns, humor, puns, and puns (It's not AQ without puns, you can't get away from it).