Trigun, Space Cobra Recommendations
Both are science fiction animes featuring a humorous blond guy dressed in red, with an arm that can be turned into a very powerful gun that everyone is after for one reason or another as the main character.
Ablonde outlaw dressed all in red with a gun hidden in his arm and an easy smile. He is a Legend, pursued by other outlaws looking to make names for themselves by outgunning a desperado of his caliber, but every person that he encounters underestimates him because he seems "too goofy" to be THE LEGEND. Space Adventure Cobra's DNA is all over the space western genre, but nowhere more obviously than in Trigun.