Hmm... fights I'd like to see.

Gai vs. Kakashi: If they're really on equal footing it should be great.

Sasuke vs. Lee: Could be absolutely incredible as long as the animators don't decide that they're both moving so fast that they can get away with DBZ "fight lines" smacking into each other over and over again.

Kakashi vs. Itachi round 2: I would love to see Kakashi train enough to be able to at least make Itachi work for it. He doesn't have to win.. I would love to see him fight an uphill battle though.

Sasuke vs. Neji: Wanted to see it durin' the chuunin exams.. they never got to it. I'm just curious to see as to how it'd unfold at this point.

Also, it'd be nice to see one of the female jounins in a fight against someone that wasn't head and shoulders more powerful than them (Oro, Itachi).