Sweeney Todd- This is the ultimate finale, I love that it takes the opening number and moves it up a step which makes the "sweeney..sweeney...SWEENEY" with the sopranos on the D sound amazing, not the mention the entire finale sequence is shocking (if done right). I saw a horrible high school production that butchered the ending (along with the entire show). All they had for their orchestra was a keyboard, I'm sorry but you need an orchestra to do this show a justice, not a keyboard.
Parade- Absolutely chilling, the reprise gaves me chills when I saw the tour.
Titanic- I love the music to the show and I thought the ending tableau was a perfect way to leave the show.
Into the Woods- A great way to end a phenominal show.
Sunday in the Park with George- What can I say, I'm a sucker for reprise finales

But again this final scene is amazing. The cast enters and sings one of most beautiful pieces ever written and everyone clears the stage to leave George alone reading, just phenominal.
Reefer Madness- I think the ending sequence of this show is hysterical. The entire faux-finale complete with confetti cannons which leads into the follow up of the characters and the finale.
Les Miserables- Very powerful, but I must say my favorite part is the duet/trio between Fantine, Eponine, and Jean Valjen. When the Fantine and the Eponine blend perfectly it is a slice of heaven.
Candide- "Make Our Garden Grow"...what else needs to be said?
Tommy- Tommy was the first show I ever really "got into". My parents were hippies so I heard music by the Who since I was born. The reprise of "Listening to You" is great.
Caroline, or Change- Very powerful. I can't listen to the finale without listening to "Underwater" first. I love how that entire symbol ties together in that song. It is heartbreaking.