The Hitcher
Explorer
Farmer isn't your Background. What caused you to your trade your plowshare for a sword? That is your Background.
I think you're onto it, although it seems to be a combination of both.
The biggest duds on the list, for me, are the two newest additions: Sailor and Guild Artisan. I appreciate Guild Artisan quite a bit more than I would Merchant, because it at least makes explicit a connection to an organization that could have reason to send you on adventures, but it doesn't really imply any inciting incident beyond "it's your job." Sailor is too broad, too dull. It's Peasent, but of the sea.
Running away to sea seems like the prototypical adventuring catalyst to me. It certainly was historically in the real world. "Fisherman" would be a peasant of the sea, but Sailor has enough romance to it without becoming too specific (or implying that the character is already an accomplished fighter, as Privateer and Corsair do for me).
Discovering some crazy secret through his isolation is the catalyst for the Hermit. He then needs help to deal with it.So how is becoming a Hermit the same as becoming an adventurer? Unless you're doing solo adventures!
Blergh. There should only be more if they're interesting as adventure catalysts and mechanically different to what's already there. I ask again: how is Peasant different (mechanically) from Folk Hero?IMO Background is your background (the key is in the name), what you did before you came an adventurer and there need to be more