The horizontal layout, gold borders and textured foil set them apart from any other Pokemon card design before or since, which is why this short-lived mechanic remains a favourite among long-time TCG collectors
So often wed have a Bristly Bill, Spine Sower out with a bunch of other enablers, and our opponent would just chump block it, then win
Oakhollow Village and Rockface Village seem useful
Fire-Forged Friends: Yuma and Shark seem to finally be friends after their Tag-Team Duel, due to Yuma's constant protection of his life points and defense of Shark's own personal failings in front of their opponents
We now have synchro monsters, XYZ monsters, pendulum monsters and link monsters that can all utilize the extra deck and all of a sudden, having a good extra deck makes the difference between winning and losing