When the original Pokemon games were released, we had a grand total of fifteen different types of Pokemon. However, when Gen II came out we got two new ones dropped on us, Dark and Steel.
Favorite moves include Gyro Ball, Flash Cannon and Heavy Slam.
Favorite Pokemon are Lucario, Aggron, Steelix, Scizor, Ferrothorn, Metagross, Bisharp and Aegislash.
As a general rule Steel types tend to look awesome. While my current main team doesn't have any Steel types on it, I frequently rotate one in (usually Scizor or Aggron). To be fair Steel is the only type I've ever built a single-type team for.