One of my favorite songs for helping to explain the importance and differences between time signatures is "Question!" by System of a Down (https://www.youtube.c

One of my favorite songs for helping to explain the importance and differences between time signatures is "Question!" by System of a Down (https://www.youtube.com/watch?v=ENBv2i88g6Y https://www.youtube.com/watch?v=ENBv2i88g6Y). The intro is 9/8 (as a 3-2-2-2 grouping), followed by a section in 5/4. The verses are the same 9/8, except for regular jumps to 6/8 (during the phrase "Are you dreaming?"). The chorus is 6/4, with repeats of the same 5/4 section from the intro. The bridge is a mash-up of the 5/4 again with jumps between 9/8 and 3/4 and the outro is 4/4 back to a final 9/8 section. It's not always easy to pick out what specific signature is being played at every point in the song, but the "suspended" feeling of hanging beats as the signature changes is very obvious.