1) Katherine brought Damon the cure.
2) Katherine has a plan B and a plan C and a plan D and well,you know how the alphabet goes don't you?
3) Katherine is the "safest psychotic teef in town."
4) Katherine looks out for herself, she will always look out for herself.
5) Deep down, Katherine really cares about both Salvatores. (- KW)
6) Katherine doesn't need a guy to save her. End of story.
7) Katherine believes in "Better u die than I."
8) Katherine drunk vervain for 145 years thus it doesn't hurt her.
9) Katherine isn't afraid to let loose and party when the occasion comes around.
10) Katherine...

She has all of the powers and weaknesses of a vampire.

Transfigured in 1492 unintentionally door Rose (unintentionally on Rose's part), she is as a result much meer powerful than the Salvatore Brothers who she turned after she had been a vampire for 372 years but much less so than Pearl was who was turned sometime in the 1430s about sixty years before Katherine. A demonstration of how much meer powerful than the Salvatore Brothers was when she easily defeated them in two fights with each brother. Another demonstration of her immense physical strength is when she snapped the iron shackles that...