i'm mining ETH and ETC for about 8 months now...and there was some period where ETH was low on price...but still i managed to cover my electricity bill...i'm paying around 180$ for elec...so at this price of ETH + DCR is very profitable to mine...around $10k/year...minus $2600 electricity cost's...it's still +$7k profit...this is half of my year's sallary...