I know that after the events of Nibelheim Cloud took on Zacks personality but what was Zack like?

Would this personality cause Cloud to flirt with every woman he comes across as it is mentioned by Aeris that Zack was a ladies man and was confident.

Would he be mean and cold to the members of Avalanche and people in general such as on the train to sector 7 when Wedge asks Cloud if he thinks hes got a bright future would he say "I wouldn't hold my breath" or "What do you have in mind"?

When Jessie asks him is he woul like her to make him a special ID card would he say "Thanks anyway" or "Looking forward to it" (Flirtatious)?

I have posted a similar topic before but couldn't get many responses, any answers would be appreciated as I am doing an essay on FF7 and characters personality is a major part of it.