I'm a show-tune nerd. Right now it's "For Good" and "Defying Gravity" from Wicked. But pretty much anything from Pippin, Chicago, Les Mis, and classic Sondheim... Popular tunes include songs by Adele and Lady Gaga... also, great dance songs from the 80's, and classic pop and R&B - think Aretha Franklin, Simon & Garfunkel, James Taylor, Janis Joplin. And many more.
The Best is Yet to Come
Dance Me to the End of Love
J'ai deux Amours
And many many more
I used to like to sing "The Lion Sleeps Tonight", but as I've gotten older, I've lost my falsetto and can't sing it anymore.