BlackCoin, because NXT was a good idea ruined by the worst distribution in the history of crypto.
Blackcoin's distribution was terrible...it was instamined. BC had a 1-week distribution period where 99% of the money supply was instamined by the creators who paid to rent out all of the hashpower and mine all of the coins, then since they controlled almost the entire money supply they traded back and forth with themselves pumping the price and trading volume.
Mintcoin actually has the best distribution of these style coins as it was released first, and was the most profitable coin to mine while it was still mineable, has already great merchant adoption. Don't be fooled by the pump and dumps.
LOL...I think you have your facts mixed up. MintCoin was pre-mined and the dev dumped many of his coins long time ago. Please tell me how could the BlackCoin devs trade back and forth between themselves to fabricate $1,839,352 in trade volume? You and other conspiracists have to wake up and face reality....MintCoin is dead. Your trade volume on Mintpal is 13 BTC a day, the value of the coin keeps deflating, and there is nothing new or exciting on the horizon for MintCoin. MintCoin will never be widely adopted and because of that the price will eventually deflate to single digit sat. That is why MintCoin is in 27th place and BlackCoin is in 9th place.