I am kind of annoyed how they ended it but then I liked it too.
You should never wrap up every single thing, you need to leave that mystery behind and for people to come to their own conclusions, just like a good book.
This though:
http://www.youtube.com/watch?v=VT3zz6oWJS0 (From last episode so do not watch if you want)
I thought was really nice. Soppy has hell and as a guy I still thought it was great. Jin and Son were my favourite couple who involved over the whole thing and had a lot going on between them and their stories.
This I thought was great and out of all of Lost one of the best scenes for me.