I'm not sure. They all suck. (the bad guy always losesWait, why is everyone saying they like Yazoo so much if all he says is "hmph" and beats up Reno? He shows no personality to like.) My guess is that people like Yazoo because:
1) He's another long-haired pretty boy.
2)Like Vincent, you don't see much of him, creating a mystery! *gasp, mystery!*
3) He's another long-haired pretty boy.
From what I understand, these are the reasons. Strange.
Yazoo's only line wasn't 'hmph'; he had a whole sentence when he was talking to Loz. But, that's not saying much. He was not important enough to the storyline (neither was Loz) to be seen as much as he was. Kadaj was basically like their leader figure, therefore he was focused on more. Kadaj was also the main baddie who had subordinates (Yazoo and Loz). So there really isn't a point to focusing on a character who plays that type of 'follower' role.
i thought those guys got plenty of screentime and sephiroth shoulda got something more dramatic maybe but its kick ass when he jus stands there and stops clouds sword...and then his sword appears outta thin air...i was like WOOOOOOOOOOOOW.....but i thought the movie was pretty well put together to be honest........
and loz wasnt that bad...he kinda looked like a dumbass...in the beginning...but when yazoo and loz were fighting the turks loz was more articulate