Could you mean by this?  Darkcoin is one of the few coins with genuine innovation, here is an explanation for how it works:

http://razorsforex.blogspot.co.uk/2014/02/darkcoin-anonymous-cryptocurrency.html

It deserves a place on BTC38 not only because it is popular and high volume trade (see it's high trade volume on cryptsy) but also because there is real development going on there.  There's no problem with the Darkcoin mining rate.  It has a solid supporter base and has kept a relatively stable price compared to many other coins.  

Also an announcement about Darkcoin beta testing phrase made it to the 'hot' section in r/bitcoin:
http://www.reddit.com/r/Bitcoin/comments/1zde2w/darksend_beta_is_live_now_drk_darkcoin_the_worlds/

This demonstrates a high level of acceptance of darkcoin's usefulness by bitcoiners, indicating it is a respectable coin and worth adding.  I'm sure Darkcoin will be one of the highest volume coins traded on btc38.



Edit:
Also Darkcoin is DRK, could you please correct this in the poll.