Think about it: in A New Hope, all he does is fly quickly out of Tatooine, get tractor beamed into the Death Star & when they "escape" (the Imps let them go 'cause they put a beacon on the ship) they fight a few TIEs.
This scene is what brought it into question for me. Han leaves the controls and jumps into the gunner's seat. WHAT? If he's such a good pilot wouldn't it be smarter to out fly the TIEs and have Chewie or Leia man the guns?
And at the end he just pot-shots Vader before things go kablooey.
In Empire he can't even maintain his ship properly. Then he avoids asteroids (mostly) and this is the best flying he does in the series.
In ROTJ he doesn't fly the Lambda shuttle, he makes Chewie do that, "I dunno, fly casual." Chewbacca flies the Falcon more than he does, am I wrong?
It's Lando & Nien Nunb who are doing all kinds of acrobatics in space and inside DS2. Sure, he loses the radar dish, but he helps destroy a filipping DEATH STAR! and people constantly gripe about that dish...
I love Han and Lando equally. I just think Han is a boastful, but tricky pirate with lot of luck, and based on the movies, Lando just might be the one with the skills at the controls.