I believe that both Atton and Carth are great characters. Carth's not whiny one bit, in fact, he is honest and loyal, especially to female Revan. As for Atton, he's cool and all, but if I were to hang out with him, he might assassinate me...
There is no emotion; there is peace.
There is no ignorance; there is knowledge.
There is no passion; there is serenity.
There is no death; there is the Force.