L true weakness
Do you think that L was superior to Mello or Near? I think so, however L's weakness was Light himself.
I think there was gay undertones to their relationship. It was made obvious by the last scene of L on the series where they speak on the rain and L wipes Kira's feets (and so does Kira wipes L's face).
So... do you think L's vision of Light (being Kira) was clouded by his feelings towards him?
And Light was also struck by L in the same way I think. It wasnt the same for Light's thrill being chased by Near, or fooling his own task force.