Lost deserves to be cancelled. It's been declining ever since the start of season 2. In season 4 it had Lost all the magic it once had. It was just this tired thing with the characters boringly retreading the exact same sort of fucking behavior they'd shown so much before and the show was still pushing things as interesting and mysterious except they weren't. I quit watching the show and I'm so glad I did. I've told people to tell me about any characters they kill off, because by the time I was finished with it I wanted most of the main characters dead. And the show kept yanking around the audience in this stupid manipulative way. And god help us, the bloody dumb Love Triangle. Puke! I got so sick of it all. And they killed off some of the few characters who actually should have been kept around. Load of shit.
I wasn't bothered by season 2 of Heroes, but I haven't seen season 3 yet.