Hey congrats on your payout, most people likely don't ever get to that first payout. Right now, I'm at a total of 49.76 with one day left this month. I haven't written a hub for a couple months and make only about .05 cents per day, so likely will make my first payout next month, which means 17 months into my hubbing I will get my first payout.
I've written 37 hubs, and from what I can gather certain subjects and hubs do much better than others. For me, Lawn care, golf, and writing online have done the best. I would say that reviews on popular products could be a very good niche to get into. Opinion pieces and commentary on certain subjects largely don't do as well.
I think I'm going to switch over to being paid directly to my Adsense, instead of the adsense program, this because it would help me make my payout quicker through adsense with my other adsense endeavors.
I'm looking to make a comeback at hubpages, or at least start writing here more consistently again, It's a quality place to write.