Honestly, I preferred the manga to the anime. Not to say that the latter is bad, by any stretch of the imagination, but it did get a bit wild and off-the-rails with it's final arc. The manga keeps things very grounded and existential. Anyone who's ever worked a shitty job for menial pay with no chance of advancement/further prospects will find something to relate to.

Also, nicotine withdrawal ("nic-fits") are severe enough to turn even the most jaded working stiffs into a hero!