Well yes, I do enjoy having my heart broken and hopes crushed. No but in all seriousness, I really like watching survival shows not because they're good, but because it's fun to find new interesting trainees and follow their journey after the show, and to discover new groups!
I've watched all four seasons of Produce 101 and GP999 out of the major ones. Under Nineteen and Idol School I barely got into, but I did finish both of them as well. And from individual companies I have watched Sixteen, Stray Kids, No Mercy, MyDOL and d.o.b. I might begin watching Idol Producer or Ywy later.
And if Queendom and Kingdom count, then yes, those too.