Except I do play Puff and know exactly where you're coming from? I've eaten those KOs often enough anyway. Spacing and reading are necessary for all characters, so the characters that thrive upon something you should have down regardless of who you play and only need that thing in order to thrive (because Sheik's moveset is perfectly fluid or because Puff's hitboxes and air mobility make her impassable at times) are going to be the easiest in that sense. Peach has her tech, Fox and Falco have techs on their techs, ICs have their grab techs, Yoshi's got dead-end techs that only REALLY benefit him. What I'm trying to say is basically what victra's post does: I'm thinking in the technical aspects of these characters because I suck at that aspect, so it's what I find the hardest. I don't like inputting dozens of commands a second, I like landing the right move at the right time for the right reason.