There are many qualities I like about him on paper,
Forget about the alcohol for a second. I'm not even sure if you like him if this is the best that you can say about him.
Give yourself permission to change your mind about someone. Also, it's absolutely OK to have your own deal killers. I'm married now, but if I was in the dating pool I know that I couldn't date someone who couldn't be on time. I could be friends with them, but I sure as hell wouldn't live with them. Does that make a control freak? Probably, but I'm perfectly willing to tolerate the criticism if it means that I get to live my life in peace.
So what's wrong with breaking up with someone that you're eh about?