I read someone describe MiB III as 'the best sequel that nobody was asking for' and I couldn't agree more.
IIRC i also read that Josh Brolin would literally sit in a hotel room and using technology would try and sync his speech patterns, pitches etc to TLJ's as much as humanly possible for days, weeks which is why his impression of TLJ is so good.
'We're not gonna make it, are we? People i mean.'
'It's in your nature to destroy yourselves.'