Brick Mercenaries have done a number of custom minifigures from the Aliens: Colonial Marines theme but Private Daniels is our favourite. Firstly I have to say that we have never really been a fan of yellow heads as they always look dated, however the yellow head and arms go really well with the painted camouflage.
There are some really nice painted detailing on this custom which include the DEATH slogan and the hand grenades. He also features a custom-built Motion Tracker, that does have a glow-in-the-dark screen which sounds pretty cool.
Be sure to check out the other custom minifigures from the series on Flickr.