There is some unknown quality about a rider that draws a fan to one rather than another. I happen to Love Primoz, Nibali (since 2009!) and Wout from the current set of riders.I'm not from Belgium. I think Roglic is a nice guy and a very strong rider, but nothing about him excites me.
I like van Aert... because... I don't know. If I'm honest it might be because I once saw his girlfriend in an interview and she seemed nice. Maybe she isn't even. If she is, he doesn't need to be. But often it's these kind of silly things that make me like or dislike a rider.
Other views differ and that's just fine. I don't particularly care for Ala or Sagan. I wont deny their talent, they just don't excite me .