I find the quality of their songs better than anything else i've ever heard. I only put them last because most people know them. They're far more universal than most, and (often, meaning some songs) bring out a philosophical or thought filled side rather than the typical battle rap style which can be seen throughout most other hiphop songs/artists. If you listen to many other Aus hiphop setup's, their lyrics will often slip into mediocre, typical rhyme patterns, where Hilltops bring something fresh every song. In my opinion their lyricism far surpasses other groups, but like i said, that's only my opinion, so feel free to disagree.
I prefer the Restrung album over their others, purely for the fact they've such a variety on it.
I used a translater cos i was bored. Maybe it's not a real word though, haha.