It's interesting how one of the reasons doge was picked was because of its low difficulty. Yet other then bitcoin and litecoin, it has the highest difficulty.<p>Understandable though considering dont know of many coins other then bitcoin, litecoin, and now dogecoin
I would have also considered Primecoin. It's another cryptocurrency, but the unique thing about it is that as of now it can only be mined using CPU. I myself have tried mining it with Amazon EC2, but only using the free trial (which gets me ~$0.30/day I believe). I have no idea how it would work out with a larger instance on a paid plan, but looking at the performace/price I got with some other trials of cloud services (like Azure and Digital Ocean), I don't believe that mining it (or any cryptocurrency really) is profitable on a cloud computing platform.