1. He never showered or brushed his teeth on a regular basis, leaving him smelling like shit most the time. He'd get angry at me if I asked him to shower.
2. He was always on his laptop playing games or on Skype to his mates.
3. He wasn't going to quit smoking, I hated that he always smelt like stale cigarettes (and B. O as mentioned in 1.)
4. He had major anger issues. He would throw tantrums if he didn't get his own way. Slamming doors and raising his voice. He would get mad if I was better than him at something. Guitar Hero for example. I can remember him throwing one of the guitars because I beat him. Also, Crash Bandicoot. He threw the controller and gave me the silent treatment.
Yet I'm the one copping all the abuse right now because I'd had enough of his shit and did the right thing by breaking up with him. He called me a waste of space and all the names under the sun. The guy is 26 for fuck sake!!!