I like the yoyos to play lighter, shape doesn’t really matter, if by response you mean unresponive/responsive, then unresponsive, if you mean different responses, then i havent really tried enough to have formed a preference.
You know what, I have NEVER recommended one of these to anyone before but I think you will enjoy it, a Shinwoo Hi-Power Zen (Not the Zen 2 or Zen3) These are mid-sized, and without the weight rings, it plays real light and fast, throw the weight rings back in and you have a slightly heavier fast playing throw, I actually miss mine It got screwed up in the mail >.<. It is a low cost metal that plays pretty well. I know you can’t buy them here but Yoyonation might have some, or maybe YoyoGuy, I would link to them but thats against the rules here so check it out on your own.