Common backgrounds are not compatible with Nobility, Magical, or Elven backgrounds.
Pickpocket – Trained in Sleight of Hand, Deception, & Stealth, Dex +1, Soft Step
Minstrel – Trained in Performance & Culture, Cha +1, Musical Instrument x1
Trade Smith – Trained in Smithing, Mining, Artifacing, Hauling, & Appraisal, End +1, Mastercraft or Tinker
Merchant – Trained in Appraisal & Persuasion, Cha +1, Mercantile
Apothecary – Trained in Alchemy, Medicine, & Appraisal, Wis +1, Animalism or Thaumaturgy
Dark Secret – Variable