Many answers do or don’t get GA’s and it doesn’t bother me. It’s when I think I’ve given a GA-worthy answer and I don’t get one that I begin to wonder if I’m getting a bit too far off the wall.
But you can never know for sure what people will find useful or GA-worthy. GAs make me feel good and validate my efforts, and knowing that people think I have something worthwhile to say motivates me. But I also enjoy answering just because I enjoy thinking something through or remembering a story.
If your answers don’t get GA’s, then look at the ones that did. See what the differences are. Sometimes you can’t tell the differences and it seems random. I know I get a lot of GA’s just because I’m me and people give me the benefit of the doubt for my past work. I also get GA’s because I write good answers. And then I get GA’s for no apparent reason. I can’t help the first and last reasons, but I sure can do something about writing good answers—or better answers. So that’s where I think one can work to improve oneself.
For the most part, people don’t hand out GA’s just because you answer. They do it because it’s a useful answer.