I like the show, but I can't stand Star Wars, Star Trek, Dr. Who, Stargate, Babylon 5, and I could go on and on and on.
There are fans that would flay me alive for saying what I just said.
You don't like Firefly. Fine with me. I'm not gonna sit here and try to convince you otherwise. I do just hope you'll respect that I do like the show, and the movie, and the comic books.
Edit: As for why I like it (which was more or less your question) I just liked the theme of it. It was a Sci-Fi show that didn't try to fill itself with robots and aliens (closest you ever got were the Reavers and they were technically human) and kept strong with a fair blend of the western genre, which I'm also a fan of.
I thought the cast was funny, each with their own quirks and faults. I dunno what else to say. I just enjoyed watching it.