Depends on the person. I learned quite a few good habits from video games, particularly how to become more focused, driven, and patient. After getting fairly serious with a competitive game in my mid thirties, I found it translated rather unexpectedly to other pursuits. I am unsure if I would have found these parts of myself otherwise; I certainly hadn't before, and I had no shortage of variety in my hobbies or rigor in my career(s) prior.