You should see my mains and seconds in my Sig. but if you can't, here they are:
Mains:
Sonic/He's my hero, idol, and my childhood. Also, his moveset is the most interesting of all the other Brawl characters IMO. Requires extreme skill, speed, and strategy.
DK/Like Sonic, DK was also a large part of my upbringing, whilst maybe not as much so as Sonic. His moveset is also highly balanced in speed, skill, strength, and also strategy as it takes good timing to get the most out of his best moves.
Lucario/While carrying no real place in my heart like my last two, Lucario has started to grow on me in both Pokemon, and Smash Bros. alike. His moveset is "extremely" interesting in the fact his strength and abilities are in a constant rate of change. He's the most unique character in Brawl, aside from Sonic, and maybe Olimar.
Secondarys:
Link/Back then, I used to always love naming this guy after myself, before I started naming all my RPG characters "Blue", so of course this guy's gotta be in this list. Also! He's been my Main in Smash Bros. 64, and Melee, so that's an even larger reason! His moveset stays true to how it's always been, though I will not lie, he suffered some major de-buffs. Regardless, I'm willing to keep using him in every Smash game, because I gotta tell ya, this one's a lot a fun to play as!
Mario/He's the one that started it all! He was the very first video-game character I ever knew. No one can take this dude's place, ever! His moveset is the most balanced around, requiring no true skill to master, however to play competitively? That's when he becomes a "truly" interesting character.
Bowser/This last one on my list actually started as just having some funnies with my friends with his hilarious Suicide Grab move, laughter was all around. As time passed, I quickly grew onto him, and have kept playing him ever since. Please note though howver, that out of all the characters I've posted here, this one's the most likely to change, so keep an eye out.
...and that's it! Wow...I sure can type...I probably shouldn't have made a reply "this" long...
Oh well! >=P