How to choose the right niche

So I am looking to try something new for the 2009 year. This isn't my first attempt at IM I had tried previously but it did not work out the way I wanted and in fact I didn't even make a single sale. I believe I did not make any sales for multiple reasons, one large one being that it was a subject that I was completely uninterested in, I chose it because there was a good deal of products I could sell and it seemed easy enough.

I also went a hundred different ways with a thousand different things, so it didn't work too well.

This time I want to take it slow, choose one thing that I like and profit with it. Right now my main problem is choosing the right niche for me. This is why I am posting here.

Some of the things I have a lot of interest in are computers, video games, movies, sports, audio/visual equipment, car stereo, and a few others.

A little bit of interest in things like robotics, cooking, web design, and some other stuff. This is stuff I may not have a lot of knowledge in this information but I am willing to learn.

I feel that it is in my interest to do something that I will love I just need help in choosing that thing that I can love, but can also make money with.

I would be highly appreciative if anyone could give me suggestions on a niche for me or examples of how to come up with my own. Also ideas upon how to monetize it.

I intend to fund these by doing some writing for people as well. Is it still essentially 5 dollar an article? I read somewhere that people pay 50 dollars for a single blog entry. Anyone know where I could find something along those lines.

Thank you,
Lee