Captain America is my favorite Avenger. He's an all-around good guy. Honest, loyal, noble, dependable. A champion of freedom. An inspiration. A true hero.
He's selfless, willing to help others despite the risk. When the colonel throws a grenade at the recruits, pre-serum Steve Rogers jumps on it, not knowing it is a training grenade. He protects his fellow soldiers by his willingness to make the ultimate sacrifice.
He's determined. In the face of adversity, he gets up each time he gets knocked down. He is rejected by the army five times before Dr. Erskine sees him as a potential super-soldier serum candidate.
He's a natural leader. His integrity and strong convictions inspire his teammates. He encourages them to work well, train hard, and get along. He understands the strengths of each team member and helps them succeed. He commands loyalty and is loyal in return.
Captain America has a strong moral code and does what's right. He believes in using his powers for good. He's the first to stand up and fight for those who cannot fight for themselves.