I'm actually surprised that the Vini/Harvey vote is even as close as it is, tbqh. I think the graveyard plays into the character opinions a lot- especially since Vinicio was there only slightly longer than Harvey. After that, it was me and Vini arguing there for quite some time, both mostly in character. I will give credit that Buffy built that character and stayed with it- often loved him, often wanted to beat him with something.
The voting is a mix of the person staying in character and impact on the game, in my opinion. For some of these, I weight one more than the other. Like I'm voting Gavin over Logan, because Logan just seemed non-existent for much of the game, even if he was mafia laying low. Gavin stayed out there and played, plus was a fun character.
I've also tried not to look who played what before voting so i don't play that into the voting, but I remember too many of them (damned photographic memory). This was easier in the first ballots when some of the people didn't post.