Most recently the CoreCo Standard at Worlds. Love @ first throw for sure. Bought it 5m later and a week later they had me on the team lol.
Also Kuntosh, Avalanche, and the original TMBR Irving proto. And going back a decade or so, Dark Magic 1, Good & Evil 2, and Bare Bones were all similar insta-cops.
Funny though, the vast majority of yo-yo’s I like were things I tried because I liked the look or the people involved and just happen to like the yo-yo’s play as well. Rare that I play something and then HAVE to buy it like that.