What makes a good "5A Yoyo"?


So, ive been getting into 5A in the past few weeks and i m enyoing it a lot so far! i´ve been mainly using my barracuda, aviator and supernova. Now i have a question. what makes a yoyo good for 5A? of course there is preference here too, but for instance my positron which i love for 1A just feels bad for 5A and i hate using it for that. my Tre 2k13 which has a V shape also just doesnt work well either. so what makes a yoyo good for 5A? is it weight, shape or something else?
thanks :smiley: