2003 Mikey!!

Physical Appearance :
Sexy.

Personality
Has sanguine temperament which means he is care-free, artistic, and very extroverted.
Michelangelo is slightly more immature than in the 1987 series and likes to tease and annoy his older brothers, especially Raphael, to whom Michelangelo is the foil. In fact, a running gag is that whenever Michelangelo says or does something excessively outrageous, usually involving a catch-phrase from the 1987 show, one of his brothers (usually Raphael) will slap him on the head. Other characters such as Master Splinter and the Ancient One have picked up on this habit, but usually, use it only whenever he actively disobeys.

Raphael and Michelangelo mostly have a love-hate relationship in which Michelangelo frequently antagonizes Raphael, but Raphael shows that he cares about him whenever he's in danger. With Raphael's attitude, and Leonardo's extreme discipline, Mikey seems to be closest to Donatello (however, he is still very close to his other brothers).
Mikey is regularly treated as the youngest brother and little is expected of him, although he has proven to have exceptional speed and agility. He has shown empathy for others, as proven in particular by his adoption of Klunk, a stray kitten and his friendship with Leatherhead.
In some episodes, Mikey takes on the role of a costumed superhero called "Turtle Titan." While having no superpowers and gadgets, he proves himself quite effective in his own right and even befriends other superheroes, such as the Silver Sentry and the Justice Force. As Turtle Titan, Michelangelo uses grappling hooks as both a weapon and a mode of transportation, and a small shield used for protection and as a throwing weapon.

Although not shown as particularly focused on ninjutsu, preferring to spend his time reading comics or watching movies, Michelangelo is quite an effective fighter. In the Season 2 finale "The Big Brawl," he became the Battle Nexus Champion, the best fighter in the multiverse. However, when fighting in the Tournament, he only actually won one fight properly. His first was against Splinter, who surrendered, his second was against Raphael, whom Mikey 'beat' by just being annoying and causing Raphael to charge into a wall by accident. Michelangelo actually won his third, but his fourth was won out of pure luck.
On the other hand, Michelangelo later won a rematch against the last finalist completely fairly, and earned a medal of honor for his behavior during the battle. In some episodes - particularly Return of the Justice Force, Touch and Go, Reality Check, Membership Drive and The Unconvincing Turtle Titan - Mikey even demonstrates quick wits and intelligence, aiding his allies and brothers with decisive ideas. While this proves he is actually more intelligent than he lets on, it is implied that he has very little interest in seriously focusing his intellectual development.

According to Splinter, Michelangelo has the most raw talent of the four, but because of his incredibly limited attention span, it's very unlikely he will ever meet his true potential. In Same As It Never Was, the dystopian version of Michelangelo has devoted his whole life to surviving without the Shredder's detection - so it is very possible that the Michelangelo seen in this episode is the Michelangelo who has reached his full potential.
In early profiles of the 2003 animated series, Michelangelo is regarded as being the most athletic of the four, although unfocused on training mentally (though those are admittedly old profiles and may have been early plans for the character, he has certainly proven he is an effective fighter when need be). This profile statement has since been repeated in the profile of Michelangelo in the lead-up to the debut of the Fast Forward season, which began airing on July 29, 2006.

As far as this incarnation of the Turtles goes, Michelangelo is so far the best (possibly the only) cook in the group. In The Shredder Strikes Back (Part One), Mikey is shown cooking breakfast. Though he does mess up the fried eggs and asked "Hey, scrambled's okay with everybody, right?" (this is met with a chorus of "Again?") Raphael later comments "Say what you will about Mikey; the guy knows how to scramble an egg."
In The Darkness Within his worst fear is shown to be betrayed by his own brothers. He encountered Leo in his nightmare where he revealed to replace his left arm for tentacles (due to choosing to side with the creature that attacked them) and turned against him.

Raphie LOL Ed harder hahahaa

Leo actually said no such thing! He is not, however, interfering on Mike's behalf though! He expects a ninja as good as Mike to be able to manage a standard lock without destroying the door. 

So nope. Not interfering. He is very much out if the way, watching. 

Leo has popcorn.

MAsterSplinter will join for popcorn