In addition to differences from their color, dragons differ in their approach and which skills they choose to develop. Your choice of draconic archetype shows this focus.
Drake
A drake is a dragon who has given into their feral, bestial nature. They revel in melee combat, where they savor the blood of their foes and the feel of their final breaths.
Feast
Starting at 3rd level, your bestial nature gives you an unquenchable appetite for battle, and flesh. As a bonus action, you can consume a dead or dying creature within 5 feet of you that is at least Small size (or a small-sized portion there of), regaining 1d12 hit points, plus a number of hit points equal to your dragon level. The creature must have a physical body and not be of the construct, elemental, ooze, or undead types (unless it is otherwise similar to a flesh and blood creature). You regain this ability after a short rest; it takes time to digest and build up an appetite again. You must be in your draconic form to use this ability.
Metallic dragons have qualms against eating intelligent creatures, especially humanoids, and prefer to only eat dead prey. Chromatic dragons lack these qualms, and some particularly sadistic ones may prefer them.
Feral Instincts
At 7th level, you gain proficiency in the Intimidation skill. If you were already proficient in the Intimidation skill, you may add double your proficiency bonus to Charisma (Intimidation) ability checks.
You also gain advantage on Wisdom (Insight) checks to detect hostile intentions, and on Initiative checks. Your instincts are always primed.
Vice Grip
Starting at 13th level, your bite has become like an iron vice. When you hit a creature with a bite attack, you can choose to also initiate a grab. You gain advantage on your Strength (Athletics) checks to initiate and maintain the grab. While you have a creature grabbed, your bite attacks against it gain advantage, and your bite attack can only be used against that target. If you use your breath weapon while grabbing a target with this ability, it has disadvantage on its saving throw to reduce the damage. You must be in your draconic form to use this ability.
If you use this ability on a creature larger than you, you latch onto it instead while you maintain the grab. It is not slowed by your grab (unless it cannot carry your weight), and you cannot move it with your movement. But, you automatically move with it if it moves while you are still grabbing it.
Wing Attack
Starting at 18th level, your wings have grown strong enough to be an offensive weapon. As a bonus action, you can make a wing attack. Each creature within 5 ft. of you must succeed on a Dexterity saving throw or take 1d4 + your Strength modifier bludgeoning damage and be knocked prone. You can then fly up to your fly speed. The save DC is equal to 8 + your Strength modifier + your proficiency bonus. You must be in your draconic form to use this ability.