Eh, I'm in the "as long as gaming doesn't overshadow your priorities, you're fine" camp. Personally, college has systematically destroyed any love of reading I've had when I was growing up and post-college schooling probably won't change that fact. I haven't actually had the time to pursue my music playing stuff until getting out of college, but we'll see how that changes now that I'm back home (and I still listen and pay attention to music as much as I surf the 'net). I'll admit, gaming has definitely had the lion's share in my personal hobbies for the past few years.
However, I still enjoy it to this day (even more so after letting go of my younger teenage habit of beating games I didn't even like that much to conform to the Gamerankings/Metacritics worshipers or for e-peen and just playing games for myself). It'll only become a "bad" habit for me if gaming somehow manages to overshadow my intended law career, jobs, volunteer services, or social life (with that said, I still don't regret missing my high school prom to play a Megami Tensei game). In comparison to those things, gaming gets regulated more in the "free time" slot every time.