I checked out you hubs and I think that the quality is definitely there! Two things noticed is that all but 1 of your hubs are gaming related. The other thing that I noticed is that you've done 10 hubs in 6 months.
My favorite subject is cooking. It is something I feel comfortable with. That said, I've steped out of my comfort zone to do: cats, cars, craft vendors, weight control, fast food and other subjects. In doing this, I have opened my self up to many more different audience groups.
After I make a new hub my traffic is good for about a week, then it tappers off, so I need to post about once a week. If you post your hubs to Digg & Reddit ( the more social network sites the better ) you'll get extra traffic and higher search engine page rank.