Trouble understanding sentence


> 「質問に答えていない。  
>  私は、人を殺すのが楽しいのかと訊いたのです」  
>  サーヴァントを睨む。  
>  歪な短刀を持った影は、  
>  「 **とりわけ何も。第一、殺しちゃ楽しめねえだろ、色々** 」  
>  ひひ、と。  
>  愉しみを共有したがるよう、下卑た笑いを私に向けた。

What does that last sentence mean?  
I think he is saying something like:

> Not particularly. For once, you can't have fun killing.




第一 (≂ そもそも) means "to begin with", or "in the first place".

殺しちゃ(=殺したら)楽しめねえだろ (≂ 殺してしまったら、楽しめないだろう) means "Once you have killed (people),
you can't have fun (with them anymore)".

So he's saying he does not particularly enjoy killing people, and that he
can't have fun anymore if he has killed them... (implying he enjoys doing
_various_ things to them before killing...)




第一 (≂ そもそも) means "to begin with", or "in the first place".

殺しちゃ(=殺したら)楽しめねえだろ (≂ 殺してしまったら、楽しめないだろう) means "Once you have killed (people),
you can't have fun (with them anymore)".

So he's saying he does not particularly enjoy killing people, and that he
can't have fun anymore if he has killed them... (implying he enjoys doing
_various_ things to them before killing...)

