Am I the only one who finds perl data structures simple and consistent? Once I understood the difference between () and [] (or {} for hashes), it was easy (too easy, some might say!) to construct complex data structures.
Having those constructs so effortlessly available with a minimal amount of syntax spoiled me. To this day, I would likely still prefer to do any kind of complicated ETL involving deeply nested structures with Perl.
$foo->{bar};
$$foo{bar};
And quoting or not the key, etc. Slices and individual elements, etc. Probably looks like line noise to outsiders when you have a long one using parens to grab a specific array element, combined with $$ and so forth.