(6/22/2015) If the creature targeted by Gideon's first ability changes controllers before it has the chance to attack Gideon, the ability will apply to it during its new controller's next turn
Ultimately, it comes down to a passive play style versus an active one, and due to a combination of speed and strategy, the latter will always win.
Attack, hit for 6, gain 6 life, draw two cards, and thats not counting your other lifegain synergies
There are technically 26 different Magic: The Gathering color combinations that you could use when building a deck, and 25 of them have obscure lore-based names attached, which experienced players tend to use freely, but can be confusing for newcomers
Having the added ability to counter a spell or bounce an annoying creature also works in some situations
You can easily build a Dinosaur deck by pairing any two colors, but there is little reason not to do three-color Dinosaur builds