hmmm,
Yoda, Chewie and Han Solo.

I actually liked the concept of Jar Jar, the first fully animated 3D character in film. A lot of new boundaries were pushed with his creation and it has followed in many movies since.
An unimportant civilian of a civilisation that had previously taken a back seat in the global politics of their home planet. highlighting that no matter how passive you may be, global crises requires your attention and participation. Also later representing that there are plenty people in positions of responsibility that perhaps shouldn't be there due to inability to understand the depth of their responsibility or the politics going on around them.

having said that he was fairly annoying and could have been handled better.
Having just watched the original Trilogy over the last few weeks I think one of the biggest faults of the new trilogy was relying too heavily on CG.

I also really liked Qui Gon Jin.