Raiders are awesome; I'd say sneaking around raider hideouts listening to them trash talk is a good 40% of why I love Fallout 3 and FO4. They did a great job with them in this game. Only thing that could be better is a DLC that expanded on them and the various other 'shady' factions and basically embroiled the PC in a few different factions. So many possibilities: prostitution, slavery, drug trafficking, cannibalism, drive-bys, raiding, gang wars, etc.