Because they are often the coolest, and there is a certain prestige to being able to claim ownership over something nobody else has
The Moody color palette of a city at dusk is the perfect backdrop for a vibrant yellow Jolteon to stand out against
Appealing to Standard players as well as Commander and every format in between, there are many cards that players are chasing after to complete their decks
Aragorn will shut down one enemy blocker when it attacks, but if Aragorn's controller is the monarch, no creatures can block that turn, which easily paves the way for a game-winning attack
Its like every set now if you change out the black cards for white ones
Like our ongoing discussions about Oracle Text or Misprints, there are so, so many dumb entries into the Reserved List that we can revisit this topic at a later date