Mr. Brown can Moo is a favorite Seuss and Fox in Socks is soo hard but fun to read
For older kids, all the Kate DiCamillo books are wonderful for reading aloud together - Edward Tulane is incredibly moving and sweet, we purchased most of her books after that one and have enjoyed them all. The chapters are just long enough you can get a couple in if you have lots of time, or just one if you're in a hurry and they each leave you anticipating the next one.
Ella the Elephant books are nice for preschoolers. Mr. Stinky Cheeseman is silly and fun to read as well.