I'm not particularly crazy about scrypt-n, I don't like how the n-factor scales and it is just a temporary reprieve from asics.  That said, it IS a temporary reprieve from asic. So, for us GPU miners, its a way to stay relevant for a little while longer.  I know the asic lovers will flame me, but CPU/GPU mining has its place in the life-cycle of a coin, and scrypt-n, for all its faults, ensures that for the time being.  I personally like x11 much better (yes, yes, I know its not asic resistant blah blah blah) than scrypt-n.  They're both stop gap measures though, so why not use the one that doesn't rape your GPUs and your electric bill?