Well, another race that I really like are the Dark Eldar. Actually, to be explicit, at first I disliked, but I had to use them, and I realized its true power, I understood that they were a very good race. Here I will tell you more about them.
The Dark Eldar are a Kindred of the Eldar, an ancient and advanced race of elf-like humanoids. Their armies usually have the advantages of speed, though they are often lacking in resilience. They are the thematic equivalent of the Warhammer Fantasy Dark Elves, and indeed Dark Elves in general. Because of their affinity for bloodlust and inflicting pain on their foes, they are generally considered an evil race and the miniatures reflect this, with spikes and jagged armour plates being common features.
The Dark Eldar are depicted by Games Workshop as a race that is sadistic in the extreme, revelling in piracy, enslavement and torture. Like all factions of the Eldar race, the Dark Eldar have access to technology that is extremely advanced by human standards. Players of Dark Eldar armies may select various anti-gravity skimmers such as Raiders and Ravagers (Troop transports and mobile weapons platforms, respectively) to launch high-speed attacks. They strike with little or no warning, using an inter-dimensional labyrinth known as the Webway to traverse the galaxy safely and far more quickly than most races are able to with their Warp jumps.
The Dark Eldar are unique amongst the Warhammer 40,000 factions in the sense that they do not occupy one or more planets, but rather one city, Commorragh. Commorragh has always been portrayed as a colossal city within the Webway, and in November 2010 it was described to be in actuality an amalgamation of several cities and realms located within the Webway, having started as a single port but since Vect's overthrow of the old houses had grown to amalgamate these new territories such as Shaa-dom and Iron Thorn.
Here you have some pics of them;