Most any other type of music.
A capella is maybe my favorite genre of music AND the most annoying.
There are A Capella groups that I love (Pentatonix is not one of them).
I don't like the songs with overly done beat-boxing. But i love the harmonies of some a capella groups.
If someone really is interested, I'd give you a more curated playlist that includes really great work by Rockapella, Straight No Chaser and others.