It depends. After a few drinks, I'm a better person that I normally am. Much more friendly, happier, and outgoing. The downside is that the more I drink, the more I just sort of uh, go for it, especially with women. I also say some things that are sort of embarrassing when I'm reminded of them; nothing too emotional or malicious, but just things I wouldn't have admitted or said if I wasn't drunk.
I never really get mean unless I was in a bad moon before drinking, and even then only really with whiskey.
edit: also this is with people, when I drink alone it's usually because I'm depressed and naturally that changes things.