Sephiroth looks like a nerd? what the hells wrong with you. Coward? hell no, It was him against the world. He used Jenova to fight for him because they were unworthy to face the Godly Sephiroth. The slaughtering of the Shinra headquaters was awesome, so was the impaled snake. Sephiroth is by far the greatest villain so far in the FF series, looks, personality everything. And his the most popular villain too.