The Journey of Han Solo
Han Solo is the prototypical Material Ego Man. Confident, handsome, capable, fearless, intelligent...arrogant. He starts off in the movie as a nonbeliever.
Luke Skywalker: You don't believe in the Force, do you?
Han Solo: Kid, I've flown from one side of this galaxy to the other, and I've seen a lot of strange stuff, but I've never seen anything to make me believe that there's one all-powerful Force controlling everything. 'Cause no mystical energy field controls my destiny. It's all a lot of simple tricks and nonsense.
Han Solo believes in one thing: himself. Han Solo serves one thing: himself. He doesn't believe in the Force. He doesn't believe that everything and everyone are connected by a unified field of energy. He believes in taking care of #1 (Han Solo). And that is why he is alone. Solo. Well, he does have his "dawg," Chewbacca.
He is not an evil person, and he does have a good heart. It is just deeply buried underneath his own selfishness. This selfishness has gotten him into trouble, thus he is a man who is haunted by bad karma in the form of Jabba the Hutt. He literally owes a karmic debt. When you are on a the path of EGO, it causes a lack of wisdom, and therefore allows one to make undesirable decisions that have negative reactions. Bad karma.
What happens to Han Solo? Well, his skills as a smuggler are purchased by the Rebellion. As soon as the job is finished, he intends to take his earnings and pay off his debts. Before he gets the chance to leave, the Empire attacks, and he is pulled back into the fray, showing that he does have a heart and willingness to be unselfish. As we all know, eventually karma catches up with him. He is captured by Jabba, and frozen in carbonite. He has hit rock bottom. He is in the process of being divinely humbled.
Now, he has achieved good karma, and he has real family/friends. He is rescued from his literal darkness, as the carbonite has left him temporarily blind. This is highly symbolic. He has completed his journey of the dark night of the soul, he has been to the dark, and now makes his way back to the light. Slowly, he begins to regain his sight. Slowly, he comes back to the light, to the truth, to the guidance of the FORCE. What's the first thing Han sees when he fully regains his sight in Return of the Jedi? A mofo-ing JEDI doing badass mofo-ing JEDI SHIT. (cue lightsaber sound FX) Luke is no longer the "boy" that Han once knew.
Not only has Han just experienced the love of his new family, but he has now seen the power of the Force as it is expressed through Luke. We see Luke become the Jedi he was always meant to be. As this happens, everyone around Luke becomes a true believer, (know-er, actually) including Han. Han has experienced love, and he has experienced the Force, something greater than himself.
Han Solo goes from being the Materialistic Ego Man to being the Spiritual Love Man.
Han DID shoot first, though. ;)
PS. Just watched the trilogy again. After Han Solo is saved in Return of the Jedi, Han generously offers his beloved Millenium Falcon to Lando Calrissian to fight the against the Death Star, another testament to his change from selfishness to selflessness.