In the old days, *up to the mid 80's*, a Motor manual was THE brand I would look for. (miss those things) Chilton's and Hayes are OK for somethings and also available at a lot of public libraries (who also have access to the online databases). That and their photocopiers and Youtube are good for planned repairs. They have also had errors in them in my past experiences.
For home, to keep, I agree with the factory manuals. The only issue I might have with factory manuals, is "vehicle specific tools" that a dealership might have, might be confusing to someone who isn't mechanical (and doesn't know work around's or general use tools to use).