So let's start
#10 Cyclops- Scott Summers- This guy has been my favorite character ever since I saw the first X-Men movie, I really liked the movie back then but when I finally understood it I already like it only a little but still I like it. I like his powers too, a really power full optic blast, an optic blast I think powerful than Superman's laser eyes.
#9 Colossus- Piotr Rasputin- I also like this guy because of his powers. And also I like how he can not only turn into organic metal but he can also have super-strength when he turns into metal.
#8 Giantman- Hank Pym- I thought at first that Hank was only Ant-man when I was little and as it turns out he has also a lot of superhero names but still same powers, he was Ant-man,then Giantman,then Goliath,then Yellow Jacket,then Wasp,then Giantman again in Avengers Academy, he is just plain awesome! :D
#7 Hawkeye- Clint Barton- I just love characters who uses bows and arrows,and not just people who use bows and arrows also a lot of awesome weapons, I'll just tell it to you guys soon, so getting back to the topic I like this guy cause he can hit anything with anything, even if the shot is impossible to make. If you just watched the new Avenger: Earth's Mightiest Heroes episode it would explain a lot of things.
#6 Spiderman-Peter Parker- I have known and liked this guy for 14 years(same age as I am, that's right I'm just 14 :D) I just like the idea of a man having spider like powers and I like how every writer relates his life to normal people with normal problems.
#5 Hulk- Bruce Banner- I like this guy cause he can take on any superhero even the strongest ones like Thor, he even picked up Thor's hammer in the Ultimate Avengers Movie. So I like him cause he can kick ass.
#4 Wolverine- James Howlett- This guy is just awesome. Immortality and retractable claws it's just awesome.
#3 Thor- Thor Odinson- This guy is God! I mean literally a God, He can also regenerate thunder and lightning, hence him being the God of Thunder and Lightning, and he can beat up Hulk.
#2 Ironman-Tony Stark- Just like Batman, he has almost everything. Luxury and awesome gadgets that no man has ever seen before.
#1 Deadpool- Wade Wilson- Now my favorites of favorites (in Marvel,but you get it right?) This guy is just awesome he is also immortal like Wolverine he can use 2 katans like no other, and he is funny, a wise ass character, and of course bad-ass!