Which Star Trek episodes could I watch with a non sci-fi person to understand why I love it?

I don't know if I can explain my intensions correctly.

I would like to make my wife understand my affection towards Star Trek, why it makes me feel like home.

My favourites are TNG, DS9 and Voyager.

I would need some episodes with as few sci-fi (alien races, shape shifters, warp drive, wormhole) as possible, and as much love, personal relations, moral lessons, real values that can make a person with different interest find the comforting escape from the materialistic reality in it.