Seme is
*mean asshole
*psychopath/sociopath
*manipulative/blackmailer
*abusive/violent (mostly rapists/sadists)/ fucked up deviant/pervert
*annoying
*his actions bring up mixed feelings for various reasons
It doesn't mean that the seme on the list must be like that all the time. Sometimes it's just an occasional behaviour or he changes with time and becomes likeable. Moreover, the fact that seme is on the list doesn't mean I hate/dislike him.
Part 2
http://www.mangago.me/home/mangalist/395930/ 
