katiegreen:

Ditto Drain Brain and Zazen (but then I've always encouraged flavour). Note to self: include a variant on that edge for a specific NPC: it's something he should be good at.
Ditto also Morphling the Pretender: I'm one of the ones always arguing not to make the Shadowrun TN system easier! Still, the opening was canon-created: how do we use it? I've always ruled that any knowledge background skill specifically derived from an active skill (and thus a "bonus") could not be used as a complementary skill for that particular active skill: the PC's knowledge of the active skill already subsumed that knowledge. However, knowledge background skills independently purchased could be so used. Easiest way of keeping track of this on-sheet was to record as background skills only those specifically purchased, and just keep in mind the 1/2 rule for actives.
Most of my PCs and NPCs tend to have personal cultural knowledge skills appropriate to their background: Confucianism, meditation, religion, Tir symbolic language. Because of a central NPC several PCs have made a distinction between card games (gambling), card games (skill), card games (cheating), and card games (social interaction). (Background story: having to leave a place in a hurry once because the Divining skill kicked in while playing poker with a significant ante-pot on the table and - to break the possible future - the cards in-hand and being dealt became a quick variant on 52-pickup.)
TinkerGnome:
Your PC and a sometime troll member of my team should get together sometime and go head-to-head over Urban Brawl season forecasts