Biff and Happy

What do you make of Biff and Happy? Are they reliable characters? Are they happy?
When I first read that Biff and Happy were 30 years old and still living at home, I was in awe. I thought that they both cared about each other very much. Biff and Happy are brothers who both live in the upstairs of their parents house. Happy has a job but Biff does not. Biff was insecure about his job, which was working at the ranch. I don't think that Biff and Happy are deep down truly happy. Happy has a good job and is content with it but feels alone because he doesn't have anything other than his job. Biff is unhappy because he decided he didn't want to work on the ranch any longer. I don't think that Biff and Happy are reliable characters because they are so insecure about what they want with there lives that they could easily change.