Hmm... no one was really annoying.

I thought Wakka was hilarious at times! Like when he tried to (SPOILER)cheer Rikku up after her (SPOILER)home exploded, he said (SPOILER)"it's like happy fireworks, ya!?" What an idiot!

But the funniest scenes with Wakka are when he gets pissed off. When (SPOILER)Luzzu breaks the news about his brother and it zooms up on Wakka's face, and he punches him in the face. Hilarious. Also, later on Bikanel Island the same thing happens when Rikku is trying to say something, I forget. It zooms up on his face and he makes a "HNNG!??" grunting noise. Hilarious.

I don't know why you'd think he was annoying, really. The only person remotely annoying on the team was Tidus in my opinion.