I love it. Before GAG, I was in a pretty sad kind of state. Oddly enough, GAG picked up my mood quite a bit in whatever way GAG does. I'm not perfectly happy, but I'm MUCH better. I also met some cool people I would've never met on here, I've been able to (or at least I think so) help people out, and I've been able to get help from people on here. I really do love it here. I don't really understand why, but my personality lets me feel better myself by helping others out. It gives me a sense of purpose when I feel like I've helped someone and this sense of purpose picks up my mood. And... even if there is a problem with trolls, creeps, stalkers, you name it, I can overlook that for the positive points GAG has to offer.
Yahoo Answers was where I used to be before this but it didn't help my mood at all. I was still able to get the sense I was helping people, but it felt less personal and I only had a small interest invested into it. For GAG, I can say I have some degree of emotional investment in it too now. If GAG disappeared, I wouldn't be like "what will I do with my life? :(" but I certainly would be sad.