I've been a Meshuggah fan since 1996. The past two albums have been absolutely horrible, not including Rare Trax.
Favorite album would probably be "Chaosphere", followed by "Destroy Erase Improve".
Download "Beneath", at about the 0:50 mark after the sick little bass solo, and if you aren't literally thrashing your head, throwing shit at people, or your body against someone else...stop listening to Meshuggah. Because if that shit doesn't make you physically violent, then you're no metal head, much less a Meshuggah fan. It's literally infectious.