Hmmm, I'll have to go with Dr. Martin Luther King. Not only was he trying fight for civil rights, but improved the lives and status of African Americans and he persevered through the immense resistance that came to him. He didn't bomb people to make a point. He didn't make death threats to make a point, yet a large amount of people in the world think they can get what they want if they have a weapon.
Fictional? Pft, Sonic the Hedgehog. Independent, fast, carefree, etc.
Jackie Chan - He was my first hero that I could remember. When I was much younger, I loved watching his movies. I was in awe at how fast he moved, his flexibility, it was just amazing. He was the reason I took up Martial Arts.
Bruce Lee - I really didn't know much about him until about 2-3 years ago other than he was really famous among the Martial Arts community. I watched his movies and I was once again left in awe. Not only was he incredible in his movies, but outside of the movies where he spoke of his philosophies and such just left me speechless.
Miyamoto Musashi - I heard about him being one (maybe the) best swordsman so I decided to read more about him, so I picked up his "The book of Five Rings" and I was amazed at what he knew and what he had to teach. Being able to defeat opponents at the age of 13... That's just incredible.
Morihei Ueshiba (Osensei) - This man is incredible, I was reading that he could throw down whole groups of people with ease and not to mention he was the father of Aikido.
Goku - Goku... even though fictional, I still consider him a hero. It's just his positive attitude towards things and his never ending determination that just makes me look up to him. He always faces his opponents, no matter how much stronger they are to him, and he always pushes himself beyond his limits.
Backstreetboys, oh no, sorry that's my favourite sing group ^^
My hero is probably Mel Gibson, he isn't a super uber fighter or anything, but he does right in his life, he is just very cool, even though he was caught drunk, he takes himself to rehab, which shows that he knows thhe seriousness of the situation, he is just very cool, and a good actor/director too.
My hero is Allen Iverson, a 6-0/ 165 lbs NBA superstar. Its unreal what this little man can do. By playing his heart out evry game hi proves that size dosent relly matter. Hi has that "never say die" atitud, hi never gives up, hi allways whants to win.