Absent-minded( Unearthed Arcana, p. 87)
You are fascinated by knowledge and learning and are capable of pursuing complex trains of thought quite quickly. However, your preoccupation with such thoughts makes you a little less aware of your surroundings.
You gain a +1 bonus on Knowledge checks (although this does not let you use a Knowledge skill untrained). Drawback: You take a -1 penalty on Spot checks and Listen checks. Roleplaying Ideas: Characters with this trait might flit from idea to idea, trailing off in mid-sentence or mumbling their way through complex ideas. Conversely, characters with this trait might be extremely articulate but still allow their thoughts to move faster than the pace of a conversation.