Conclusions: most of Eva's audience wants to get BLACK'D.
Still, I would put Mike in the first place from this list, he has no pronounced negative sides. He is part of the Lena slut route, but unlike Axel, he is not a psychopathic stalker, not a notorious asshole and loser Robert, not a blackmailer Seymour.
Most of the male characters have strong negative sides, but Mike doesn't seem to have any - he's just a confident guy who wants to have fun with a hot girl. When Lena brings Ian to the club, what does Mike do? He's cool with it, no drama. He needs character development, and we saw the first hints of this in Chapter 10.