X-Men: First Class — Volume 1 by Jeff Parker, Roger Cruz, Paul Smith, and Kevin Nowlan
Traditionally, fans of mainstream comics separate DC and Marvel on the basis of realism. As one of my friends once put it to me, the heroes of DC are aspirational, while the heroes of Marvel are relatable. You aspire to being as good, kind, and humble as Clark Kent is, even if he had a fairly normal childhood; you relate to Steve Rogers’ being someone who failed at everything despite having the right intentions, even if he eventually gets the opportunity to succeed because of everything he learned from those failures. In short—Clark Kent is from Smallville. Steve Rogers is from Brooklyn. It’s not a hard and fast rule, obviously, since who you aspire to be and who you identify with is a very personal thing, but it’s a good rule of thumb.