45-50 Card Deck based on research and experience on my duels frpm 12/10/02 through 01/2004.
Generally 45-50 card decks tend to be too many cards in terms of speed and low top-decking(getting the card you really need within your turn) draw probability. However it is still fun to play them especially when you know you have a very complementary and powerful cards in a deck. This article is simply to aid my fellow yugioh players who are new to the realm of duel monsters. It is a generalization of a BIG DECK composition but must have a smooth compatibility factor between monsters, spell, and trap cards. Usually a beatdown deck could be an effective BIG DECK since it’s simple purpose its to attack other monsters and hit the life points whenever possible? Keep in mind that a 50 cards deck is mainly for fun-play. One needs to compensate for the slowness and low drawing probability by using themed based and/or monster type/attribute based deck. In the end BIG DECKSs are too slow to be consistent winners but could prove fun to play based on type related cards.

Monsters Cards
Total Monster Cards count: 10; 3-6(level 5 or 6) 10(level 1-4) 6 or 7 offensive and 3 or 4 defensive. Most would be effect-based monsters unless their atk is above average like level 4 1900+ Attack or defense stats.

Effect Monsters
Total Monster Cards count: 10; 3-5(monster  removal & stoppage), 1-3 Extra Drawing, 1-3 magic/trap negation/destruction/disruption/recursion.
Note1: What I mean by STOPPAGE, is using effect monsters whose effects are designed to paralyze/remove your opponent’s monsters to prevent attacks or to return them to the hand or deck.
Note2: Disruption can be deck/hand depletion or Life Point burn effects.
Note3: Recursion can be reviving your monsters and regaining spent/used life points, spell and trap cards.

Sample Effect Monsters:
Witch of the Black Forest
Sangan
Cyber Jar
Fiber Jar
Magician of Faith
Mask of Darkness
Newdoria
Yomi Ship
D.D. Warrior Lady
Mystic Tomatoe

Magic/Spell Cards
Total Magic/Spell Cards count: 15; 3 of these Spell cards can be of a specialty variety based on compatibility with Monster cards and trap cards you include in your particular 45-50 card BIG DECK.
Include the most stable staple-type cards;
Monster Reborn
Raigeki
Dark Hole
Premature Burial
Card Destruction(near staple)
Graceful Charity
Pot of Greed
Change of Heart
Swords of Revealing Light
Harpy’s Feather Duster
Heavystorm
Mystical Space Typhoon
Snatch Steal(near staple)
Mirage of Nightmare

Trap Cards
Total Trap Cards Count: 10: 3-5(monster  removal & stoppage),
Include the most stable staple-type card: Some of these aren’t so much a staple trap card yet do provide a very consistent effectiveness in most deck-types;
Trap Hole
Bottomless Trap Hole
Call of the Haunted
Imperial Order
Magic Cylinder
Mirror Force
Seven Tools of the Bandit
Magic Jammer
Magic Drain
Solemn Judgment
Torrential Tribute
Waboku
Sakuretsu Armor
Widespread Ruin (another identical trap card yet has a different card-art/name called Claymore Mine) far as I know these aren’t out yet in English/U.S..
Horn of Heaven.
Time Seal
Reckless Greed
Ring of Destruction

A Basic 45 Deck Composition
20-25 Monster Cards
10-15 Spell Cards
05-10 Trap Cards
A Basic 50 Deck Composition
25-30 Monster Cards
15-20 Spell Cards
10-15 Trap Cards

I hope this article will help those who are willing to except my tips and suggestions.

Comments are welcomed
DUEL WITH HONOR
Angel
AFernan104@aol.com