I've always played as Isabelle. Currently using the Caterpillar Kart with the small green wheels (not sure what they're officially called) plus the Beaver Glider.
The kart combination I use are usually the Mr. Scooty, Crossing Tires, and the MKTV Parafoil. I don't pick any other kart combination other than those I listed.
I also play as Toadette and Baby Peach too. I also play as Dry Bones and Green Inkling Girl (Maybe Dark Blue Inkling Boy) but hardly ever online. I play as Villager Boy, Toadette and Baby Peach online a lot, but the other characters cannot top Villager Boy as my go to main.
mine changes depending on who i feel like playing. i enjoy playing the female villager, Bowser Jr., and Rosalina. sometimes i'll play King Boo, Lemmy, Larry, or Baby Rosalina, but that's only if i feel like a change. my kart customizations change a lot. i never stick to one
I've always played as Isabelle. Currently using the Caterpillar Kart with the small green wheels (not sure what they're officially called) plus the Beaver Glider.
I've been playing with this combination A LOT! It's so pretty!!!! Because yes, I choose my characters/karts because they're cute and stylish, not because they're fast. Bad people do that.
Link and Rosalina because they seem to have identical statistics between them. As for the vehicle combination, I always preferred mr. scooty with roller wheels and the hylian kite for handling.
My current main is orange shy guy but I've also used Luigi, King Boo, and Donkey Kong in the past. I always go with the city tripper, rollers, and paraglider and I'd recommend that combination to anyone.
After not having the DLC on MK8, since getting deluxe I've really enjoyed using Isabelle's bike with whatever wheels / glider I feel like at the time. I typically play Dry Bones and Wario with a little bit of Toadette mixed in.
I guess my main would be Dry Bones, though I tend to play different characters across the different classes.
The other Small I use sometimes is Shy Guy. Among the Mediums I'll use female Villager and Peach/Daisy. If Large, due to the addition in Deluxe usually King Boo, but also Dry Bowser, Rosalina, and Waluigi.
Lately I've been playing as Male Villager but sometimes I use Inkling Girl, Peach or Rosalina.
I usually always go for a bike option rather than a kart (for some reason I just think they go faster) right now I'm using all the parts from the BOTW bike
Yoshi or Isabelle. I don't think I've actually used anybody else.
I dunno what kart parts I use. I used to use bikes with the Wii U, with MK8D I've just stuck with karts. Pretty sure I'm still using the default kart because "reasons"...Reasons being I already unlocked everything in MK8 and knew what I wanted and by the time I unlocked all my parts in MK8D I just couldn't be bothered and stuck with the default.