I think games make me more productive in life in general. I spend a lot of time at home (due to illness) and I feel like games make me a more active participant in life, while TV makes me feel like life is just passing me by. I get more energy for doing housework, going for walks, meeting people etc when I've been playing a game than when I've been on the couch. I think it's because I'm and active participator in games, it somehow feels like I've "done something" or "accomplished something"., giving me a little boost to my self-esteem, which in turn gives me energy and stamina for participating in real life too.
I don't think games have harmed me.