First of all, I hate mastodon, much the same reason as guitar god. The vocals just ruin it for me, it's like out of key singing/ grunting most of the time, it's not screaming/ death vocals and it's not singing, it's in between and it pisses me off! Despite that, the drummer is great, I really enjoying watching him play and listening to what he does, I believe he was questioned once about his kick sound and it not being up front enough or clicky, I think his reply was something about him being a hand drummer not a footwork drummer, which to me, somehow impressed me, because he does really well all round
Better production + new singer would help for me liking them, PERSONALLY