Deciding on the top 10 fighters over an entire decade is an invitation for an open-ended debate. Throw in a mandate from MMA Junkie managing editor Simon Samano that each person on the staff was free to set their own criteria on what qualifies as worthy of consideration for the decade’s best list, and a staff that pulls from a wide variety of ages stationed all around the globe, and you have plenty of leeway for a diverse variety of selections.