Hot damn! I didn't know Sonic Blast Man was in a Bust-a-Move title... and he looks just as majestic as he did in the arcade punching game that I hurt my wrist playing. I only played the first Bust-a-Move on the SNES, but I am a big fan of the original Bubble Bobble though. I even have a pink shirt with the two of them on it that I sometimes wear to work... just because.
I love the stylized look of everyone, especially Marina, since you gave her a real pair of legs, instead of those two chibi blob things with no ankles. Bub and Bob look so adorable, too.
I don't know your favourite, but I will guess Drunk.