Oh well... I tried to keep my votes to 3, which was tough.
So I voted
Kyon: He's the reason this anime was funny anyway
Mikuru:
MOE ultimate
Kyon's sister : MOE ultimate in the making
Of course that leaves out Yuki. Now that I think about it, I should have just voted her, too... And maybe Asakura, too. Oh well... I kinda liked most characters, but I thought I had to point out who I liked more than the others.