My 200 pennies, stick to what you love. It won't feel so much like work. It's easy to jump into what you think would make money quickly, but if it's not interesting to you at all, you'll get board quickly.
When I was an affiliate, my first site was health insurance related. YUK! Soon after starting it, I was dreading working on the site. So I scrapped it and switched to something more personally satisfying. Live and learn.
Denise