I agree with a lot of the responses so far, but I'll make my own list. BTW I have a 2018 GT Sport DCT.
Like: Understated looks, heated/vented seats, infotainment (I added wireless CarPlay dongle and it's great), ride/handling, pano roof, space for people and stuff, dealership experience (this is rare).
Dislike: OEM tires are terrible (Hankook), US doesn't get heated wheel, DCT acts up sometimes, hard to parallel park*, BlueLink is trash (stopped working and getting someone on the phone to fix it was taking too much time so I gave up on remote start), lack of accessory support from Hyundai.
*Before you all tell me I'm a bad driver, here are the reasons I think it is hard to park: The backup camera is a bit grainy, and the lines don't match up with the car. So if I use the lines, I'm about a foot from the curb. If I try to guess, I hit the curb. My last car was a BMW and the passenger mirror would go down in reverse, so you can see the curb. This car, the mirror is too small and it's impossible to see.
I love this car, more than most other cars I have owned, and the dealership I use is great. I also agree that it should have a limited slip because it struggles to get the power down.