Seto Kaiba first appeared as a villain. However, after losing a duel with Yami Yugi, he changed his ways and became a good rival. His signature card was Blue-Eyes White Dragon, called BEWD, and showed a dynamic way to fight.
I’ve faced against a lot of Peak Performance decks and they usually benefitted me more than my opponent. I used to run Peak then switched to Beatdown. Now I just duel using card combos and the occasional Econ