Well you have to write for every beyblader you know.. (or at least the main ones..). Here's my list:
Tyson - devotion to friends
Max - cheerlfulness
Ray - intensity (Ray is trully a passionate person - he's passionate about everything he does.. beyblading..)
Kenny - hard working
Dizzy - so funny xD
Kai - his determination
Lee - reliability (I know that it hasn't been shown in the anime that much.. but I have a feeling that Lee's very reliable
Mariah - fighting spirit
Kevin - the fact that he has such a great opinion of himself (this sounds a bit sarcastic.. but I do like that)
Gary - ergh.. he's nice
Michael - he's pride is funny and kind of sexy XD
Emily - her smarts
Steve & Eddy - they're so hilarious xDDD
Robert - his dignity.. xD I mean his honourful style
Johnny - his sarcasm
Oliver - his elegance
Enrique - his flirtiness
Tala - his mysteriousness
Brian - his ruthless style (I used to hate it.. come to think of it I still don't approve what he did to Ray.. but he's style is awesome nontheless)
Ian - he's funky style
Spencer - the fact that he's big and he seems kind of like stupid (no offense Spencer, you rock!)
Ozuma - the fact that he can mix fighting spirit with level-headedness
Mariam - her toughness
Joseph - his inventiveness
Dunga - the fact that he's tough on the outside and soft on the inside (aww so sweet plus he's very funny!)
Salima - her kindness
Kane - ergh.. his friendly attitude
Jim - his smarts
Goki - ergh.. his toughness
Hillary - her willingness to make sacrifices for others (I know this hasn't been shown much in the anime.. but I bet she has this personality trait..)
Daichi - I've seen only a few episodes of G-Rev but I still know how he's like so.. I like his optimism
So here are my two cents^^
Here each of you will write a personality trait you like best in a beyblader. And that goes for anime chars; like Kai, Tyson (yes, him too.. I know some of guys hate him.. but I thougt gee there must be at least one thing you do like about him or it at least doesn't annoy you that much), Max, Ray, Kenny, etc meaning other team members count too. Plus all the other beybladers who weren't in teams also, like f.e. Antonio. So have fun! 
^-^
Here's my list anyway ^-^ :
n brooklyn is care free ya thats rgt..he alwaz plays wid those butterflies.. 
, helpful