[Pursuivant]

It almost makes sense to define Oblivious as a sort of "anti-Talent", although with 7 skills affected the base cost should be -10 per level.

The -10 point version described in GURPS Discworld appears to combine a group of Incompetence quirks with the regular version of Oblivious, wiping out the expected -10 per level progression for an "anti-talent."

Depending on how commonly Influence Skills are used in the game, Oblivious might be underpriced. Certainly, the Totally Oblivious option is potentially very crippling in comparison to its point cost since it wipes out default use of Influence skills for all but the smartest characters.

OTOH, overlap with traits like Callous, Clueless, Gullibility, Low Empathy, or Xenophilia might effectively give free points to a socially hapless but otherwise competent character.

Additionally, unless the GM is strict about requiring Oblivious characters to make skill rolls for normal social interactions, or ruling that traits like Oblivious also give penalties to Reaction Rolls, this trait doesn't interfere with normal social interactions, as compared to traits like bad Appearance or Reputation, OPH, Social Stigma, or Stuttering.

The real problem with Oblivious is that it just affects a group of skills, rather than being a hindrance to any roll where understanding of motives is required.

For example, an otherwise Oblivious character suffers no penalty to use skills where inability to interpret motives or social context would logically be a problem, such as use of Body Language, Carousing, Criminology, Gesture, Intelligence Analysis, Lip-Reading, Merchant, Observation, Politics, or Psychology skills.

Likewise, Obliviousness might actually give you a bonus to resist certain types of Influence rolls, such as attempts to resist subtle Intimidation or Sex Appeal, or to pick up on subtle attempts to influence your emotions using skills such as Fast-Talk or Panhandling.

In any case, penalties shouldn't apply to tasks where there is no need to interpret motives, such as using Diplomacy skill to recall diplomatic protocols or Savoir-Faire to dress properly or follow expected standards of behavior.

Finally, it could be argued that all attempts to use Body Language skill are affected by Oblivious, since people with this trait often have trouble detecting or interpreting facial expressions and body language.

Limitations might apply if you only have a penalty to resist or use affected skills, if penalties don't apply to use or resistance of one or more of the listed skills, or if penalties only apply when dealing with certain types of people.