But most of the time, the artists just aren't compatible with each other. A book needs artistic consistency and when books keep getting different artist after different artist after different artist, it gets a little wary.
I disagree, there's plenty of dual artists than complement each other.
For instance:
Mike Wieringo (granted, RIP) and Todd Nauck
Andy Clarke and Claude St. Aubin in REBELS
Cully Hamner and Rafael Albuguergue in Blue Beetle
Carlos Pacheco and Jesus Merino in Superman/Batman
Pablo Raimondi and Emanuela Lupacchino in X-Factor
David Finch and Jay Fabok in Batman: The Dark Knight
Esad Ribic and Jerome Opena in Uncanny X-Force
Rafael Albuguergue and Sean Philips in American Vampire
Mike Allred and J.Bone in iZombie
Alex Maleev and Michael Lark in Daredevil
Steve Epting, Butch Guice, and Luke Ross in Captain America
Mike McKone and Barry Kitson in Fantastic Four
Corey Walker and Ryan Ottley in Invinible
Tony Moore and Charlie Adlard in The Walking Dead
and Tony Moore and Lan Medina in Venom
And that's just off the top of my head.
