iCash doesn't say what Darksend does. Honestly I mine darkcoin because the price is stable. This incessant urge to mess with things doesn't help. There is so much uncertainty in the crypto world right now that getting written off takes incredibly little. There is a huge amount to be said for consistency.
That said as a graphic designer the flat black logo gets my vote. 

As for the whole airdrop thing? That would be hell in a hand basket to implement fairly. Every troll in the universe will leap on it with glee and scammers will have a field day. What about posting hefty rewards for people who help the coin. Spread the love but as payment. Someone who has invested time and receives a reward is more likely to be loyal to the coin and we don't end up with a dump situation.