I don't disagree that fezzes and bowties along with other clothing pieces aren't awesome, but I would to see more. Namely, the other clothes that you see the doctor wear. For example, David Tennent's trench coat. Or Matt Smith's Twead Jacket. These could even have some functionality like having an extra slot to store your sonic screwdriver when your not using it, with a new keybind to take it out called "Sonic Holster" or "Sonic Pocket." It would make roleplaying and just the mod generally more fun for doctor who nerds like myself. Another thing you could add is the addition of the combination of armor and clothing. Using a smithing table you could place your armor piece and the clothing piece to make it cosmetically a dm clothing item, but functionally an piece of armor. You could separate these with a grindstone, too. An example would be a Iron Helmet with a Blue Fez. It would look like a Blue Fez, but act as an Iron Helmet. And in later versions where the smithing table has more items, you  can use an lapis to show an enchantment glow, or an item that is used in the armor crafting recipe (eg. iron for iron, gold for gold, ect.) to what the armor piece is to hide the glow it if enchanted or just normally bind it if not.

-Thanks for consideration, Harmony.