I honestly think it would work best if bonuses were tied to the tags you picked. You're a scholar? Well that sounds like an int buff to me. Barbarian? Strength, anyone? Noble could be 1 int and 1 persuasion. Sure this might push some bonuses on the prebuilt characters that you wouldn't really want, but it would fit with their personalities more that way. At least in my opinion.
Great suggestion!
