Lately, the #1 song in that department has been "Sunrise, Sunset" from Fiddler. I can't explain it. Others that either still do or until I listened to it a lot would often had me crying include:
"The I Love You song"-Spelling Bee
"Finale(Somewhere)"-West Side Story
The finale part of Les Miz when the line-to love another person is to see the face of God
"Halloween and I'll Cover You[Reprise]"-Rent
"Defying Gravity"-Wicked(depending on my mood, if I'm going through tough times, it always gets to me)
"Make Them Hear You"-Ragtime
"You'll Never Walk Alone"-Carousel
"A Part of Us"-Once On This Island
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli