It really comes down to not just franchise choice, but in game design, how we can make a set that is appealing to different groups for different reasons, right
Additional ways you could sort your cards are: Color Collector Number Expansion/set Instants Legends Mana Rocks/Ramp Nonbasic Lands Pricey Commons and Uncommons Utility Artifacts At the end of the day, its your collection and you get to decide what goes where
Remember, you're playing green
There are also great ninja lords, like Silver-Fur Master and Splinter, Hamato Yoshi
Value Cards: Freyalise, Llanowars Fury Essence Warden Joraga Warcaller Sylvan Safekeeper Priest of Titania Ezuri, Renegade Leader Lifeblood Hydra Overwhelming Stampede Praetors Counsel Skullclamp Emerald Medallion Beastmaster Ascension Song of the Dryads Crystal Vein The green deck actually has the highest number of cards worth $2 or more, but is actually nearly tied for least valuable overall with red at $96