To be honest, I really like Kira because I share his desire to just live quietly and in peace. That said though, I don't have a hand fetish and my nails don't grow fast, also I can't excuse his urges and the way he deals with that, but his goal of only wanting to live a peaceful life is something to admire though it doesn't run from the realm of wanting domination and control.
Whereas more cartoonish villains want power over a region, people, or hell the planet. Kira wants dominion and control over his life in a way that it doesn't interfere with others but more importantly others don't interfere with it. I think it's a pretty nice twist on a villain, especially of a manga series when most of them are just mustache twirling bastards like Dio.