Related: This is the same reason I've always preferred doing server config management with Chef (which uses ruby for everything) to Puppet (which has it's own DSL). Ansible, which uses YAML config with Python behind the scene is sort of a middle ground, but often wins out because it's simpler to learn and operate than a full Chef setup. I still find myself missing Chef when I have to write stuff for ansible though.

To me, from best experiences to worst: Real language (ruby, Python) > Yaml/Toml > ini config > JSON > DSLs