I've been enjoying a deck based around dragons. 
Because remember "Dragons are the bomb" 

I usually put a lot of light monsters in my deck and several spells and traps that may upset the opponent I have a bunch if equip spells that my light monsters use to increase their attack and decrease their defense.

I like to make a Dragon Deck with lots of traps. I am good at using traps.

My favorite dragon to use is Curse of Dragon. Because with all the power ups and how easy he is to summon!

captjackharkness : Try putting two rising energys on that it would make a whopping 5000 attack points he would be dominating but tossing a couple kuribohs in the deck would save you big time.

Here is my deck that i have won several local tournaments with. Let me also say that in local tournaments they don't have a limit number of cards that you can have in your deck but they do enforce the 3, 2 and 1 card rule.

fusion deck
Blue eyes ultimate dragon
King Dragun.

Monster Cards

Masked Dragon.
Chaos Necromancer
Lady Assailant of flames
Tyrant Dragon
Blues Eyes White Dragon x 3
Tiger Dragon
Red Eyes Black Dragon x2
Herald of Creation
Shining Angel
Gren, Tactician of Dark World
Lyla, Lightsworn Sorceress
Ryko, Lightsworn Hunter
The Stone of Legend.
Kaibaman
Red-Eyes Darkness Metal Dragon
Jain, Lightsworn Paladin
Kahkki, Guerilla of Darkworld
Vice Dragon
SUMMORNER MONK
Axe Dragonute.
Gragonith Lightsworn Dragon
Snipe Hunter
Spirit Reaper
Vampire Lord
Red Eyes B. Chick
Divine Dragon Ragnarok
Lord of D. x2
Luster Dragon x2
Supply
Gren Maju DA Eiza
Iron Blacksmith Kotesu
Mystic Tomato
Armed Dragon LV5
Armed Dragon LV3
Luster Dragon #2
The Dragon Dwelling In the cave
Prime Material Dragon
Morphtronic Datatron
Dark Armed Dragon
Ganbara Knight
Eclipse Wyvern.
Spirit Ryu
Darkflare Dragon
Lightpulsar dragon
Chaos Sorcerer
Paladin of white dragon
 
Magic aka Spell Cards

Card Destruction
Burst Stream of Destruction
Inferno Fire Blast
White Dragon Ritual
Megamorph
Rush Recklessely
The Flute of Summoning Dragon
Domino Effect
Monster Reborn
Polymerization
D.R.D Different Dimension Reincarnation
Swords of Revealing Light

Trap Cards
Mirror Force
Judgement of Anubis
Solemn Wishes
Dragons Rebirth
Burst Breath
Call of the haunted
interdimensional matter transporter
Escape from Dark Dimension

Megamorph is a great card when your in a pickle!

Yes megarmoprh is a great card 2 have when your in a jam. You just have 2 be careful when using it because it can come back 2 bite you in the butt.

Here is a way 2 defeat a monster with 5000 attack and end the duel in the same turn just as long as your life points are lower than the person your facing.

Summon a Blue Eyes Ultimate Dragon, have mirror force and dark mirror force set, use a megamorph then on your turn use a harpie's feather duster and have a dust tornado set.  That way you will destroy all of there monsters in attack and defense and destroy all of there spell and traps and in case they try 2 counter harpies feather duster you have dust tornado 2 prevent that from happening. You will also have a monster with 9000 attack. This will work perfectly considering that your opponent will surely attack your blue eyes ultimate dragon just 2 get rid of it and that will activate your mirror force.

The great thing about trap cards is that most of them can be played on both your turn and your opponents turn unless it says other wise. While every magic card except for a quick play card or unless it says other wise, can only be played on your turn.

Btw if you wanted 2 know our favorite yugioh deck from the show my answer is i cant give one because every time they duel on the show
they always have a different deck.

Chazz Princeton's deck.
I don't know why....
I won a few battles with it.

My favourite deck is my banish dragon deck. It get's around all of the counters.

Tails the Fox :
How does it get around all of the counters? Some people base there decks around sneaky attacks and those are some of the most effective  decks. I just don't see how it is possible 2 fully counter a deck that is based on that.
If you do have a deck that is fully based around countering decks then what if your facing somebody with a beat down deck that has nothing in it 2 counter? You would lose that duel with out a doubt. It just sounds like a weak deck to me.

i love fairy cards  they are so cute awww and they are not strong but i dont care :3 

party star :  
In yu-gi-oh there are probably 10000 cards out there that are made to power up fairies and light monsters. If you know what your doing
then you can make a really strong fairy deck that is really hard 2 beat.