I have 2 deck I use, but here's the one I use the most:
THE GAIA DECK
Normal Monsters:
Twin-Headed Fire Dragon
Mr. Volcano x2
Mystical Elf
Niwatori
Feral Imp (My favorite Card)
Blue-Winged Crown
Amphibian Beast
Water Omotics
Steel Orge Grotto #2
Neo teh Magic Swordman
Gyakutenno Megami
Dark Witch
Soul Tiger
DarkFire Soldier #2
Spirit of the Harp
Wolf Axweilder
Luster Dragon #2
La Jinn the Mystical Genie of the Lamp
Leogun
Crab Turtle(Actually it's a Ritual Monster)
Effect Monsters:
Amazoness Blowpiper
Decayed Commander
Gearfried the Iron Knight
Invitation to a Dark Sleep
Mask of Darkness
A Man with Wdjat
Zombie Tiger
Legendary Jujitsu Master
Wall of Illusion
Lady Panther
Electric Lizard
Inferno
Zaborg the Thunder Monarch
Hysteric Fairy
The Stern Mystic
Rocket Jumper
Amazoness Paladin
Magic/Spell cards:
Eternal Rest
Banner of Courage
Rush Recklessly
Pyramid Energy x2
Paralyzing Potion
Continous Destruction Punch
Soul Exchange
Tremendous Fire (My fav. Spell Card)
Fissure
Monster Reborn
Poison of the Old Man
Dark Hole
Malevolent Nuzzler
Offerings to the Doomed
Metamorphosis
Turtle Oath
Polymerization
Germ Infection
Sword of the Deep-Seated
Heart of the Underdog (it suits me well...

)
Trap Cards:
Draining Shield
Mirror Wall
Wall of Revealing Light
Curse of Aging
Trap Hole
Earthshaker
Waboku
Deal of Phantom
Disturbance Strategy
Numinous Healer
Two-Pronged Attack
Disappear
Physical Double
Fusion Monsters:
BickuriBox
Punished Eagle
Skull Knight
Thankfully, my other decks only go a few cards over a "Regulation-Sized" deck (52 cards). How ismy Gaia Deck?