Goblin Slayer is certainly not a goblin himself, he wouldn't have to hide his scent otherwise.
He also said he can't see properly in the dark
The first episode was amazing. The only thing I'd consider somewhat weird was when he abandoned his sword because "there is too much blood on it". (Maybe he meant he can't grab it anymore and it would slip out of his hand?)
Other than that I was actually suprised how versatile the fighting was and that even small things like the totem had a meaning to them.
I'm also suprised that the rape made it in and how brutal it was in general.
I read the first chapters (basically exactly where episode 1 ended) beforehand and it's a really nice adaptation.
The only part that was missing as far as I remember it was that the goblin-poison is supposedly made out of goblin their feces and dirt - which I found did add another level of "ugh - disgusting beasts" when I read it.
Another cool thing right now would be his helmed and the missing "horns" on the side. I wonder if he lost them because he keeps fighting non stop, or if he removed them so he could walk around in caves more easily.
I also enjoy how is armor is completely roughed up, telling us that he is indeed in the field slaying monsters.