For me a simple piece of cardstock is not enough for my background paper. If I could, I would use pattern paper for all my backgrounds. Unfortunately that can get quite expensive. I also have a hard time using a sheet of really good paper from a collection when I know so much of it will be covered up. I found a paper pack of ledger paper for really cheap, unfortunately all of it had some little design either down the side or in the corners. But I love the grid look as background paper so I bought it anyway. I've had to become quite creative to make it work but it has been worth it for the price I paid.
This is a piece of that paper combined with Echo Park This and That Charming collection. You can see just a bit of the leaf pattern down in the corner. I misted the paper and hit that corner pretty thick with the mist so it wouldn't stand out to much and was quite happy with how it cam out.