Well, it's not us that you really have to write for, it's your target audience.
While there'll be a few "proper authors" here, I suspect most are just like me ... excited and keen amateurs enjoying the ride.
The Internet is 100,000,000 times larger than Hubpages and that's where your traffic, interest ... and money ... will come from.
So write for your target audience and enjoy what you are doing. Proper authors here will be quietly salivating over your hubs, taking from them the points they feel will benefit them most. Maybe they're just shy.
I agree with earner. You have to find out what your target audience is lacking and target that subject. Most of the times its staring you in your face, when you find it you wonder why no one else has written about it.
It doesn't hurt to email some of your dedicated readers to ask what they like reading or want to read. Research the topics and if you can't find much info, its likely that you could get more readers by taking up that subject.
Always remember that the topic should be worth you time, if the subject doesn't pay much then you might wanna stay away. Also look what your competition is like. Just find something you enjoy writing about and you will be having fun while making a bit on the side!
MAGAZINES: No one has a lock on magazines save a major publisher that also owns the magazine or in many instances, advertisers who also write articles. BUT with some research from the Writer's Market you will be able to identify the types of magazines that fit your topic. All will want a query letter and that too, is explained in the Writer's Market. Writers' books like this are available at all libraries.
YOUR SON'S MANUSCRIPT: My first 6 or so hubs addressed publisher insider know-how about how to get published. If you go to AthorsBook you'll see.