He holds great concern for his team members and his friends and is willing to do whatever it takes to rescue them from harm.
However after Chloe and Roulette helped him become Green Arrow again he had a greater apprehension for murder and showed restraint when fighting his old mentor, as well as telling Hawkman that vengeance and murder is not the way to get justice and choosing not to murder Zod when he could have.
(Disciple, Absolute Justice, Part 2, Sacrifice ) Oliver has been overcome with despondency in the past, going back and forth between a belief that his life has no purpose, and the belief that he could make a make a difference as the Green Arrow: Oliver easily assumes a leadership position and as Green Arrow, has been the leader of Smallville's version of the Justice League.
The more or less neutral party whose world is caught between the conflict of cybertronian life-forms, E. Some believe them to be a sign of god sent down from across the stars as a form of deliverance towards their species, others fear and hate them often reverse engineering the very lifeblood that makes up their unique elemental metals to hunt transformers and often their own kind no less for perceived collaboration.
More often than not the film series shows that mankind has more in common with the alien off-worlders than most if any of them could ever believe, interestingly if unsurprisingly enough the general consensus towards occupation of their world by these transorganic extraterrestrials is as divided as their cultures are varied.
He eventually decided to get his life back on track, thanks to Chloe Sullivan's intervention.
In 2009, Oliver Queen agreed to merge Queen Industries with Luthor Corp after Tess Mercer, CEO of Luthor Corp, requested of Oliver after receiving a heavy betrayal from Lex Luthor.
(Echo, Roulette) Oliver's style in clothing is somewhat similar to Lex Luthor's, as they both dress in high class business suits and dress pants and shirts which seems to be mostly green.
Oliver also owns a leather jacket he sometimes wears when he's riding his motorcycle.
Seeing her fighting skills, Ollie took her under his wing and got her off the streets, training her in martial arts with the hope that she could be an ally for his team of metahuman superheroes. Oliver had a scar in his chest in the shape of the Mark of Zod, from when he was burned by Zod's heat vision, (Sacrifice) but has the scar covered via plastic surgery.
Recently, due to the frequent bad press about costumed heroes being deemed menaces, and to the loss of his true love Chloe, Oliver revealed to the public that he is the Green Arrow to prove the media wrong and hopefully be reunited with the woman he loves. (Lazarus) Oliver, unlike most others, has generally kept the same appearance over the last 5 years.