OK, I'm still loving Lost. If you didn't watch the last couple of seasons, that's too bad, because since they were able to dictate their endpoint and locked in 17 episodes a season, it's been pretty consistent and the momentum has kept up.
As for Heroes, it never really recovered after that first season finale (though it was nice to see Peter shirtless - and wet - for the first few episodes of season 2). It should have been a limited series. The creator didn't think long-range and created all sorts of holes he was unprepared to fill. The end of last season rebounded a bit by bringing former writer-producer Bryan Fuller back, but he's gone again. I'm watching for now, but I'm not the least bit invested. There's not a single character I care about. We'll see if the show is canceled before the end of the season. I have no faith it'll recover. At this point if it does make it to the end of the season and doesn't improve, this will be the last season I watch.