which site to develop?

I just bought 10 or so different domain names, just went ahead and parked them. The good ones are making me maybe 3 or 4 bucks a day. (but a few are .info) In about a week I've made about 20 bucks total. I want to choose ONE to get my hands dirty with. I was thinking maybe one of those amazon affiliate stores where you buy a plugin.. but I have no experience with it all. Anyway, I have a few domains that are obvious store sites (phones, clothes, etc). And I have some that reference finance or paying bills, and a few with famous bands in the name. And one more... think cash4gold.

After thinking about it a lot I still cant decide. Any ideas on entry level monetization? I guess I've been leaning toward an amazon affiliate plugin.