Overrated 

1. Jacques Kallis

2. Rahul Dravid

They have good individual records but to me both of them aren't real match winners.

Underrated

1. Steven Fleming (he is awesome batsman....and a great captian too)

2. Lance Klusener ( Best All rounder- its sad that We didn't get chance to watch him playing more Int'l cricket games, IDK... may be because of quota system in SA or any other resons...

3. Ross Taylor (He'll be a star in future....)

I think that most of the players from NZ are underrated..