THE BEST POSSIBLE DECK

Well, every duelist has different play style. There are 3 main play styles: DEFENSIVE, SEMI-AGGRESSIVE and AGGRESSIVE. Let's discuss one by one then.

1)DEFENSIVE.
This kind of duelist will be scared by a single set card. What's in their mind? Is this card Mirror Force? Or... something else? This is a damn big weakness of a duelist. They play too defensively. They afraid to lose their life point, their monster and their field advantage. This often result in failure. Meta deck just don't suit them. However, there are some decks that can bring out their maximum potential. They can be a good control player or decks that use alternative win condition.

I)Final Countdown
This deck does not need to be aggressive. Just defend for 20 turns, victory is yours.
Turn card advantage to turn advantage, this is the main strategy of this deck.

II) Gadget Oppression
Gadgets are monster that will always give you +1 upon being summoned. It's no need to cry if your gadget dies as he has done his job. One for One removal is the main strategy of this deck.

III)Macro Cosmos
DD Survivor is immortal when you have Macro Cosmos or Dimension Fissure faced-up. So why worry about him? Just attack.


2)SEMI-AGGRESSIVE
This kind of players will take any risk into consideration before making their play.They attack to force their opponent to activate set card. They seldom make misplay if compared to aggressive player. However, sometime they'll lose their chance to defeat their opponent. They'll always think what if they don't win? So they are good in conserving resource. They won't waste all their resource in a single turn unless they're sure about their victory. This kind of players have variety of deck to use. They are suitable to use aggro-control deck and most meta-deck. Their decks normally have very high consistency and average explosivity.

I)Gladiator Beast
I'm a semi-aggressive player and I'm running Gladiator Beast. Gladiator Beast force your opponent to stop their attack.

II)Little City
Another version of anti-meta, just more aggressive than gadget oppression

III)Lightsworn/Kristiasworn

IV)Machina Gadget
This deck almost never run out of resourse.


3)AGGRESSIVE
This kind of duelist will probably make some misplay because they normally too rush for victory. If thier plan fails, probably they'll lose because thay can't recover from that. However, they have some potential which can be bring out to the maximum if use the right deck.

I)Dragons

II)Flamevell Cat

III)Prisma Gladiator Beasts

IV)Blackwings

V)Six Samurai

CONCLUSION: If you haven't built your deck, lets find out what is your playstyle and your personality as a duelist. Then build your deck base on your playstyle.Remember: NO DECK IS PERFECT, IT DEPENDS ON YOU. IF YOU WERE PERFECT, SO WAS YOUR DECK.

THANKS: POJO, YAHOO ANSWER, TCGPLAYERS, ANG TZE ZHANG.