Those who know him very well (such as Jack, Kalin, and Crow) say that he is starting to get predictable because he has been using the same basic strategies for a long time. Despite this, Yusei is still known for his genius Dueling style, being able to quickly comprehend his opponent's tactics and quickly formulate an effective counter strategy.
His Decks are generally low powered, with most of the initial cards obtained from Satellite after residents of New Domino City threw them out prior to the series. The Deck focuses on swarming the field with low Level monsters, letting him easily perform Synchro Summons to gain an advantage.
He has only lost 1 Duel (against Jack Atlas in a flashback), with a few Duels having no result and all the other Duels won. In the manga, he also has a similar record, with only 1 defeat and all the rest won.
With his own, Tanner and Yanagi's cards confiscated, Yusei assembled a Deck using random cards given to him by other inmates at the Facility to use in his Duel with Mr. Armstrong. This Deck's card count adds up exactly to 40 cards. Most of this Deck's cards feature criminal-like monsters or other shady cards. This Decks' contents were given back to their owners once Yusei defeated Mr. Armstrong.
Since the war with the Dark Signers, Yusei's Standing Deck has gained an array of different cards. He now uses the "Cycler" series as well as a new selection of "Synchrons" and their Synchro Monster upgrades. He also received a selection of new Traps which negate damage or opponents monsters effects.
Before his Duel with Z-one, Yusei received the other Signer Dragons from his friends. He also includes cards which change the Levels of his Synchro Monsters in order to Summon his ultimate monster, Shooting Quasar Dragon.
In the future, Yusei was a well known Duelist who inspired many. A list of his achievements and cards was researched by Z-one. This future was erased due to the current Yusei's actions in the altered timeline.