[Yokuutsu]

Mono-colored is best for newbies, no offense. They're easier to work with.

Hell, except for my sliver deck, I do not go beyond two colors. And I've been playing for over 10 years.

But remember, mono-color doesn't limit you really. You can still have artifacts which many do not require a certain type of mana. Any will do. Also, with multi-colored decks, you might have mana problems-not having enough or not being able to get the color you need.