Most of the time its just an annoying one-drop that slows the opponent down a little bit, but usually he can be played around effectively
As a creature type with a deep, rich history in Magic, vampires cover a lot of mechanical ground, but we can make some generalizations
And to help illustrate these point, I arranged them into three groups, from least to most harmful to the overall understanding of the game
There are few instances where being an enchantment is relevant and much like with Sicken, the value of just making something you can't kill a bit smaller in an ongoing capacity is pretty weak
Lifelink is a very strong ability and this card usually tends to play out great in most sets
If you build an Elf deck, for example, it'll likely be able to easily defeat most bracket one decks