If anyone could recommend some bands similar to Nasum/Rotten Sound/Deathbound/Gadget/Sayyadina or bands similar to Disfear/Martyrdöd/Skitsystem/No Security/Axegrinder I'd be all happy. ;o
Doom, Discharge, and Extinction of Mankind are all influences of Nasum. Those are good bands to start getting into crust punk. Oh you might also want to try Skitsystem who have a very grindcorish and crust sound.