To me (someone who does Lisp & JS, so none of these all) go seems cool for concurrency and being 'boring' (in a great way). Rust seems cool for being very robust and 'safe' (or hard to screw up with), while still doing concurrency nicely and letting you code in high and low level.
Is there any ways that Swift is more than ObjC without [[[[all] the] square] brackets]? (nothing wrong with that, if you're not into square brackets)