I wouldn't go so far as to entirely agree with OP's definition, but it's close.
Let's see...
Zey Vant To Zuck Your BLAAAAAD nya-ha-ha-ha-ha! Ahem. Yes. That'd be the primary one. For whatever reason - a disease, curse, accident of evolution, whatever - they cannot easily, or at all gain nutrition from normal food or generate their own blood cells (+ plasma?) and have to take that of others. Whether or not they actually suck their prey dry or just take a donation is another issue, but having a punctured jugular is usually fatal anyhow...
May also require "living" blood, i.e. transfusion packs (generally filtered and only much good for plasma and erythrocites) are no good. Or, they might be like hot pockets. Either way.
Optionally, can turn other people into vampires, as part of the blood sucking/draining process or by other means.
Badly injured or outright killed by exposure to sunlight. Maybe it's the heat (IR?), or the ultraviolet, or albino-style hypersensitivity (lack of melatonin?), or just a curse, but they can't go outside or easily past an uncovered window during the day.
Beheading and wooden stakes through the heart are also favourites for outright kills. They make no sense, but... yknow... tradition.
Generally, no reflection, but it depends on how far along the scale of fantasy to sort-of-realistic alternate universe you want to go.
Some kind of shapeshifting ability is a good add-on.
Superhuman strength, recuperation and seductiveness is a must. And built-in Brylcreem glands. And a castle in eastern europe. Plus a vicious, evil streak a mile wide and a taste for teenage virgins (generally girls, but you never know these days, and they always were kinda louche).
Bonus points if the staking or crisping does not suffice, for reason that they may be brought back to life by means of a secret rite that can be performed once a century when the moon is in the eighth house of Aquarius - one involving arcane runes and administering a single drop of blood to their ashes/dessicated husk.
(Definitely blood - tomato ketchup will NOT do at all.)
The twiglite one - which I understand is "get a bit glowy in the sun, don't have any circulation (ergo, no erections?), and can jump hella far" - can nark right off.