I mostly play on DN, mainly cause I don't currently own an actual deck anymore, or get out much for that matter. I like to play a minor Swarm and All-around deck, and the main deck I like to use causally is my Sophia Gishkis. It would be epic to actually build this deck, but half the cards haven't even been released yet.
Monsters:
3x Deep Sea Diva
2x Gishki Ariel
2x Gishki Avance
3x Gishki Beast
3x Gishki Diviner
3x Gishki Shadow
3x Vision Gishki
2x Sophia, The Creator (or if you can't find her under that name, Genesis Star God, Sophia)
3x Evigishki Levianima
Spells:
2x Gishki Aquamirror
2x Gold Sarcophagus
2x Instant Fusion
2x One Day of Peace
1x Pot of Avarice
2x Salvage
2x Swords of Concealing Light
Traps:
1x Mirror Force
2x Solemn Warning
Extra Deck:
2x Chimeratech Fortress Dragon
2x Flame Swordsman
2x Ally of Justice Catastor
1x Brionic
2x Lavalval Chain
2x Number 39: Utopia
Side Deck:
2x Evigishki Mind Augus
2x Evigishki Tetrogre
(To replace Sophia and Insta-Fuse if I don't feel like playing them)
Any and all constructive criticism is greatly appreciated. I have other decks, so ask if you want me to post another deck.