No, the whole point of a superhero with a secret identity is the dichotomy. Clark Kent shouldn’t be sexy or buff, he should be a nebbishy dork; Bruce Wayne’s public face shouldn’t be grim and foreboding, he should be a spoiled, dissolute playboy. The recent Superman and Batman film franchises have both suffered for forgetting this.
And the whole point of the Hulk is that Bruce Banner isn’t a scary, seething cauldron of rage, at least not most of the time. The transformation into the Hulk only has any power if it comes out of nowhere, if that big green rage monster emerges from the last man in the world you’d expect to raise a hand in anger to anyone.
The ideal Bruce Banner is a cuddly teddy bear, likable in a wussy kind of way. An adorkable loser. Totally harmless…until the moment when he isn’t. And there’s no better actor to portray such a character than scruffy hipster heartthrob Mark Ruffalo."
Arthur Chu, “Model Minority Rage” in The Daily Beast