I would say etsy by far, but you can't just list things and expect people to buy, you need to actively market yourself. The web is a huge place and if nobody knows about you you are not going to sell your work. Join Facebook and the other social networks and direct people to your shop. Spread the word anywhere you can and list often and you should do fine. Good luck!
I TOTALLY agree with this! Just because you elect to sell on an established site doesn't mean you're going to immediately start selling. Etsy is huge and there are thousands upon thousands of shops which means LOTS of competition. You can't just sit back and expect the sales to roll in. And, you'd be surprised at how many people have never heard of Etsy. I also sell at craft shows and people ask me if I have a website. When I tell them I have a shop on Etsy, I kid you not, 85% of them ask "what's that, I've never heard of it". The key is to promote yourself and your site no matter what online site you choose. There are lots of social networks and classified ad sites that are free or very low cost. There's also a very wide variety of online marketplaces with very varying cost structures.
Here's a list (constantly being updated and added to) that may help:http://winterberryoriginals.com/where-to-sell-your-crafts-online/