Would This Houserule Bother You: Unusual Backgrounds attached to high ability scores

[Johnny Angel]

For an upcoming campaign, I have been considering a houserule related to character building and spending CP.

The basic idea is that access to high ability scores would require an Unusual Background (UB)* to access spending that many CP in one area.

*Alternatively (and I would encourage doing this,) a player could use the points which would be the Unusual Background cost and use them to purchase a trait associated with the high ability.

For example, IQ of 15 would be (as described in Basic Set) "Amazing... an attribute this high draws constant comment." So, 15 IQ would be normal cost plus a Reputation, Social Status, a trait like Lightning Calculator, or something else. I may even accept a few points spent on an associated skill as taking the place of the UB.

I do not plan on being strict with what exactly the points would be spent on, as long as there is some loose connection between the ability and the traits chosen.

Right now it's a rough idea.

Part of my intent is to further prompt building characters which have some personality and/or connection to the surrounding world and also provide some cost/benefit tradeoff between players who want to choose individual skills versus those who just want to dump points into ability scores. Both ways of approaching character design is valid in GURPS, but (for the particular campaign I have in mind) I would like to encourage spending points differently but without setting hard CP-limits for different parts of a character.

I have not settle on what would be the point value associated with different levels of ability.

edit: Would this bother you as a player? Do you have any general thoughts about the idea?