I absolutely love apparel, so... this might be a long post.
New Apparel Suggestions
Glasses! I know many people have mentioned these, but I would absolutely love glasses and I hear there's 'nothing to see' regarding them and to move along. c: To expand on this, I'd love to see regular glasses with different coloured frames (horn-rimmed, silver, gold, black, white, copper, iron etc) and also a sunglasses set with different coloured lenses.
The usual black, but also 'hippie' shades like blue, yellow, red, green and others would be pretty cool. It would also be a nice way of obscuring the dragon's elemental eye colour to match their wings/tertiaries without offering contact lenses. It would only be the same as goggles, really.
Feather Apparel! So, we get a lot of feathers as Coliseum drops and, as yet, all of the feather-based apparel available is birdskull related. I have to admit, I'm not particularly fond of birdskull decorations. The skull motif can change a dragon's whole tone. Feather crests, tail decorations, wing decorations and cuffs in various colours would be pretty awesome. Might also be an opportunity to have other-coloured feather drops in the coliseum?
Eveningwear! So we have classy tuxes for the suit-wearing dragons, but little for the ladies or more feminine boys among our clans. Some evening gloves might be nice, perhaps a matching classy looking scarf collection? Pearls, maybe?
Elemental Armour! I really like the capes we have, and how they drop in the Coliseum. I think armour in a similar vein might be really awesome, similar to an earlier suggestion of Elemental 'Falls' (which sounds really cool, by the way!).
Arcane: Magic Armour! Pink, covered with runes.
Water: Coral Armour, maybe? Blue-ish, perhaps.
Fire: Flaming Armour! Red hot, steaming perhaps.
Earth: Rock Armour! It would certainly look solid.
Wind: Bamboo Armour, to match their beautiful region.
Ice: Crystalline Armour, naturally. Beautiful, but with a certain chill.
Plague: Virulent Armour! Something appropriately gross. 8D
Lightning: Electric Amour! Something futuristic looking, maybe.
Shadow: Dark Armour! Swirling black armour, almost intangible, like mist..? Alternatively, a playfully sinister Motley might also be an option.
Light: Bright Armour! Either the light version of Shadows, or something relic- or artefact-based.
Nature: Botanical Armour! Vines and leaves.
Thinking about it, this looks rather more like Festival Apparel than Coliseum drops, but they'd be nice as chest items, partially Coliseum Drops and Swipp Swaps, given that we have Elemental Runestones..?
Armour Types! I have to agree with the mail suggestion from WildWolfram. I think that would be absolutely awesome. Ornate Armour (a new design, rather than the Platinum recolour) might be pretty cool, too.
Tail Decorations! As it is, there seems to be little in the way of tailwear so far. There's the awesome new fluffies, armour, tail rings and steampunk gear. Some other jewellery or other decorations might be quite nice. I've heard a suggestion for bows, which I'd absolutely support. Also maybe something like a bell or a tassel?
More Jewellery! People have mentioned lots, so I want to just chime in with agreement for pearls, crystals, bones etc.
Expanded Collections
I love a lot of the current apparel we have, but I think that a lot of them would be even more awesome if there was ... more of it?
Ornate Jewellery! I love this new collection, so I think it would be absolutely wonderful if there were more pieces to it. The regular jewellery collection has wing bangles, simple bracelets and simple necklaces. I hope that this means that there's a chance of matching Ornate Bracelets happening in the future! Though... may I suggest that Ornate
Tiaras or
Crowns be included, should that ever happen? Other people have said the same, so there's certainly a market for it.
Wooly Things! I mentioned that I love this and I do. I really really hope that Wooly Cuffs/Gloves and Boots/Socks follow these Coats, Tails and Antennae. Maybe a hat, too.
Amour add ons! A small one, but I think a weapon collection to compliment the armour could be nice? To go with the current armour sets, a collection consisting of a Sword, Mace, Battleclaws and Shield or something would be pretty cool?
Bones!: We have a bone crown, why not other bone gear to go with it? I mentioned jewellery above, but danglies, armour made from bones, piercing-related things, etc.
More Colour Options
Some of the Apparel is perfect as it is, but I have to admit, I do sometimes wish there were more colour options to maximise the opportunity to colour-match with my dragons. I know it's been mentioned before in terms of bows and things, but...
Ornate Jewellery! More stone colours, maybe. Perhaps not for this exact line, but a batch of jewellery with more colour options for that. I love the current Ornate collection, but I wish there had been an amethyst purple stone, or a bright pink one or a ruby.
Wooly Things! Bright blue would be awesome, as would purple, red, lemon.
Wraps, Hoods and Birdskull Apparel! I'm in total agreement with Kahvinporo and everybody who has requested here. Recolours for old items would be cool. It would be awesome if there were Magenta, Purple, Caribbean, Leaf, etc options for all of those.
Armour! I love armour, can you tell? Just other colours. Metals to match the other collections, maybe. Darksteel Armour, Copper Armour... there's already gold, and Rusted is like Iron already. To be honest, I wouldn't care if you made Magenta Armour, I just love armour.