The Madman said:
Where be da Ork boyz ya git? Sissy Elves an hummies ain't worth da grot on me boots compares ta one propa Ork, cuz we iz da toughest an da meanest!
When I used to play Space Marines, I used 'da Orkz' as target practice. When I switched to Tau, no Ork player I knew ever wanted to use their Orkz against me, for some reason...
Anyhow, I collect Tau Empire in real life. In Dawn Of War though, I usually switch between Eldar and Imperial Guard. IG are useful if I have a strong set of teammates who I can trust to work together with (sadly not often, DoW players online seem to have as much grasp of teamwork and fair play as CoD players do on XBL...). Reason being that they have the trench system between their buildings, so I can set up a decent defensive line to hold out until I get the Baneblade, at which point I become virtually unstoppable.
Eldar, I use when my teammates seem pretty crap, or when I'm playing online 1v1 or 2v2. Reason being that I can use my Bonesingers to teleport behind enemy lines, send a massive army through the Webway, and end up hitting my enemies right in the middle of their base really early and when their forces are out searching for me. As the Farseers say,
"A fast strike in, and out..."