Single-Word Requests – If City Life is Urban, What Do You Call Living in a Forest?

To add more nuance (and confirm what's already been said) to the difference, I find (in AmE):

• you can say 'a forest' (in general), or 'the forest' (a particular one), and 'the woods' (the one that you're walking through), but it would seem strange to refer to an collection of trees as 'a woods' (because of number agreement) or 'a wood' (because that would refer to a particular piece of lumber.
• 'forests' are bigger than 'woods'. But a small collection of trees is not necessarily 'the woods'. Something smaller (without specifying actual size) would be called 'a stand of trees'. (i.e. if you can go into the collection and not see the end of the trees, then you're not in a stand of trees)
• 'forest' has a slightly more official, formal feel to it than 'woods'.

Unrealized
As in, unrealized ambitions or aspirations.

It's not a noun but it describes the type of person who has wasted or thrown away an innate skill or talent.

If the OP is determined in wanting a noun to describe a person who squanders his/her talents; I believe many would label that person (perhaps too harshly), as being a loser.

EDIT: In lieu of the OP's comments that the person in question is neither lazy nor immature but on the contrary; a conscientious, devoted parent and son/daughter, the adjective, unrealized, still applies. If the dream was, for example, to be a singer but through circumstances beyond their control that gift failed to blossom. It is common to refer to that person as being an unrealized talent.

Finally, if one wanted to give a more positive and optimistic edge; one could define that same person as being undiscovered.