yacoin for the reasons listed on their site:
* Currently the only CPUMined coin (with all other altcoins, CPUMining has become unprofitable as GPUs, FPGAs and/or ASICs can do it much more efficiently.
* Means that anyone can get involved with mining YAcoins. You dont need a fancy AMD video card, and a complex miner program with a lot of technical know-how
* This may also mean that the YaCoin coin distribution is and/or will be more widespread, and thus more democratic (this is speculation at this point)
* Also means that YaCoin could see a larger, more sustainable network hashrate, as miners can co-mine it along with GPU-based coins
* PoS and PoW (long-term power efficiency)
* Ultra-fast confirmations
i'm not entirely sure how well the 'cpu only' mining will work, and if people will find a loophole to get their GPU/asic's onto it or whatever,,,but if it holds up, it should be pretty cool.
i would ASSUME that once it gets out there more, a 51% attack would be almost impossible as well.
also it really does seem such a waste that people are running such energy intensive hardware to mine the other coins, especially when human energy production and the side-effects of it are destabilizing the world. That was always my big concern about bitcoin, and yacoin comes the closest so far to allieving that.
interesting too, that the original developer left the project. not sure what the deal was about that, but it's good to see that the coin had enough potential to find its way anyway.