Honestly, the more I think about Re:Zero, the more I feel like it'd be more interesting and I'd be really into it if the protagonist was literally anybody else.
I've read the LN spoilers and watched a couple episodes here and there and really, Subaru's NEET attitude is a big turn-off for me.
I mean, in episode 4 he walks through a door, finds this twin-tailed girl, and his exact words are: "First NPC found!" right to her. Like...who talks like this? Now I know you've got to have some leeway for strange character interactions when you're watching shows like these but the guy doesn't even say hello.
The idea that Subaru feels like he should be the main character but everybody and everything in the fantasy world keeps kicking him down and telling him he's not important sounds interesting in theory, but I feel like it'd be a lot more effective if Subaru himself didn't act the way he did when he's not currently in a state of maximum suffering and despair.