I cried a little once, during the Jin and Sun thing. Overall though, the ending was bullshit. I'm happy that there was a happy ending, but it was so... cheap.
They left SO many holes in the show, so ******** many..
I've been following this show for 6 years now, and the writers have continued to try and convince the die hard fans that it would all make sense, well it hasn't.
The side-ways universe was built off the ending of Season 5, so to me it was a cheap cop out to explain it all (which it really didn't, not even a little).