Yourfavorite service..cant see how I would develop it. Lots of work there.
Minecraft.. not interested in games.
Cheap overstock.. again whats the niche?
Find niche(topics) of information that interest you and stick to them. Its a learning curve.
Was there any recent sales in above niche that turned you onto these names?
My niche weed, hemp, geo names and a few solar names.
If you are new read the boards here, recent sales
http://dnjournal.com/domainsales.htm
My rule is who would buy it, how would i develop it, Can you start a business with the said domain name?
Monetize your name, get it happening so you could make some money.
Maybe you know something I dont, I hope so. Please dont register a bunch of names, write them down, think,research google them, anyhistory? Archive.org
I havent visited your sites but I hope there is some development happening, or parked at sedo to see if you get traffic. I am not proud to say I have dropped 500 names in my time. They were crap.
Better to have one $200 name than twenty $10 names.
For me none of your names stand out. #2 is best of them all, me thinks