Dissassociative Blood-Spending
One of the less obvious derangements, this affliction inhibits a vampire's conscious control over his own vitae. Vampires with this derangement have a tendency to unconsciously spend blood points to raise their Attributes at unusual and inappropriate times - increasing their strength in the middle of a round of drinks, upping their reaction speed while trying to compose a letter, and so on. these vampires have even been known tospend blood points during the day while they sleep, waking up even hungrier than usual and never knowing why.
If a character has this derangement, once per session the Storyteller can rule that the vampire has just spent a blood point to raise a given Attribute, or that the vampire wakes up an extra blood point low. The Storyteller is even within her rights to tell the player that his character's missing a blood point, or what for. After all, the vampire wouldn't know where it went. Players are also welcome to roleplay thisderangement, of course (and it can be fun to start randomly spending blood in the middle of a tense scene, just to wory the other players), but the Storyteller has final control over making this derangement a drawback rather than a simple quirk.