who do tu think changed throughout the series?

yeah she changed every season a little bit but she is más changed since season 5...a lot.

I think Nathan and Brooke, they both had really big changes.

Well I think everyone has changed alot through out all the seasons. Lucas went from being a nobody to a somebody and has struggled to find out what type of guy he is and who he is. Nathan went from being a bad boy to someone caring and he grew up and faced reality. brooke went from feeling insucure about herself and messing around with boys to being this beautiful bold women. haley grew in so many ways she smart pretty intellegent, but had to really grow up to an adult fast. peyton went from being a perra and not letting anyone in to letting certian people in and talking and growing up into this smart person. Mouth had became someone that is confrotable in his own body. so not just one person has changed everyone has. :)) just what i think

Nathan and Brooke =-)

I think Brooke has changed the most... She was shallow at the beginning but then she became such an incredible character... Also the others have changed but it is normal as tu grow up and become an adult. It is a change that most people go through.