Well that's so subject to perspective, but of all the people I've known on KMC I think the only one who never really got into it with anyone was Ladyluck. While the 'most loved' seems impossible to gauge without some kind of accurate poll, my vote for 'least disliked' would be Ladyluck. 😛
As for me, personally, though... I've got several KMC favorites. As does everyone else.