If you really enjoy the artwork, that's my number one thing
2 mana nets you a treasure token for every artifact and enchantment your opponents have on the battlefield, and since the effect is stapled to a creature, recursion and blink effects make its enter the battlefield trigger ripe for repetition
Each starter deck is composed of a set of cards that allows you to immediately immerse yourself in the game
Since I've mentioned this before, I'll summarize briefly: Most Arena players have a relatively limited card pool to build their decks from, ESPECIALLY if they're free-to-play (by choice or necessity)
Pokemon Center exclusives have no alternative source
Isshin, Two Heavens as OneIsshin, Two Heavens as One, Windcrag SiegeWindcrag Siege, and Wulfgar of Icewind DaleWulfgar of Icewind Dale Aggressive, combat-oriented decks can sometimes struggle against the midrange value piles that so many Commander players bring to their pods