I really wish the character screen displayed each individual character's stats instead of only the character stats combined with the current cart build. I'm trying to find a combination I like right now.
Metal Mario + Zucchini + Slick Wheels + Flower Glider is fast, but better have every damn turn planned out perfectly ahead of time, as turning on a dime is a disaster.
I've tried Koopa Troopa + B Dasher + Slim Wheels + Flower Glider today and really liked it so far. Decent speed and I can turn very well on a dime.