Word:"Jovial"
Everyone is different and Team Arrow was no exception. Most of the time their diversity helped their team work almost seamlessly, but other times it caused rifts to spread between members, leading to discourse, usually at the worst time.
It was impossible to keep everyone happy. Their team wasn't simple; there were two ex-castaways, a military veteran, a reformed thief, and their IT expert.
Diggle, the veteran, was a protector to the team even using his alter ego as a body guard.
Oliver and Sara were castaways, vigilantes, and broken in multiple ways. Yet Oliver was CEO and Sara was a bartender.
Roy used to be a thief, and he was still tough, but he was also a mix of Diggle's "protector" trait and Oliver/Sara's "broken vigilante" traits. Even more so, he was a bartender like Sara.
Finally there was Felicity. She was the light, extremely cheerful; jovial even.
One would think the rifts would be similar, and they usually were. Most commonly Oliver against everyone else.
Even with these rifts and different personalities they worked well together, and they wouldn't without each person's own traits. It took all of their skills to keep the city safe. And that knowledge helped them; maybe even helped them heal.