All consumption needs only for sustaining your peak condition. You are nigh or absolutely immortal from the start. Your development not functioning as adaptation power , for you development is rebirth with new superior qualities. It can be blood transcendene (collect properties and life force to induce great evolution) or magical or psionic ascension.
Few evolution later your vampire nature will look like energy-matter physiology. Eyes will look like deep crimson stars that hold own light for itself. Body will generate dark emanations from itself , and automatically banish any foreign presence from itself. There you will get advanced shapeshifting ability that allow fully mimic appearance or even properties of physiology. You obtain intangibility and mist physiology.( You are just cloud of particles)
All your development will go to way of dependency transcendence but will preserve beautiful appearance of mortality.
You may obtain many distinct and abstract powers but your beauty will always staying in your control.
You already immortal to absurd scale.
You can enjoy your powers and watch for progress of civilization . Become vampire in sci-fi setting.
You can convert others but it's not full power bestowal.
You grant normal immortality and superhuman condition(300 km/h max speed , few tons of strength) and lesser variation of your vampire arsenal. You not have control over converted but can establish mental or magical connection.
They need to consume blood for sustaining own immortality and condition but not often, they also can develop and become stronger with age but they can't achieve absolute immortality and transcend power of alpha (your)
Converted superior vampire.