in my head, papyrus sounds kinda like Skeletor. Sans has an accent I'm sure I've heard before but I can't place where from... Kinda Brooklyn, but soft spoken, he's a big guy, cheerful enough, very laid back type.
@noelle Oh dang that's... yeah that's actually pretty spot on for a voice for him. Not the one I had in mind? But it's a good voice!
@Nine I feel like literally everyone has the same voices for them.
I'm not sure if it's because Game Grumps did a voiced playthrough or if it's because of something subtle about the talking noises or what.