Moves like Monty's 'Leg Stand', or Rocky's 'Blood Feud' - which references an "ongoing feud with an orange neighbour cat" - certainly give a sense of each animal's personality
While four mana to tutor up any card from your deck isnt ideal, if you seek out a card with mana value of four or less and then sacrifice an artifact, enchantment, or token as part of this cards bargain cost, you get to cast the card for free omitting the middle man that most tutors represent
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Similarly, cards like Clattering Augur that return to your hand can be used to repeatedly pay the discard cost
While Trainer cards can only be used once per turn this can still give a good advantage for players that are needing a specific Trainer card they haven't drawn yet
Return will also be a more useful card in gameplay situations than people realize with the ability to exile a key card from your opponents graveyard