I'm so afraid Season 6 will suck. In fact, I was coming here to start a thread called, "Lost Season 6 Will Suck (and ruin Lost)". Season's 1-5 have been primarily building up to... something. Very little of it has been paid off. Very few of the show-driving mysteries have been solved, and some of them have been forgotten. Those that have been solved have been underwhelming (the numbers, the four toed statue). We've been watching, loving, discussing a show that promised to deliver amazing answers to incredible questions... and recently I strongly doubt that they have these amazing answers at all.
It's sort of like a religion that promises to get you into heaven... and then mostly has a sign at the end that says, "Sorry folks... but all we got is Jersey."