LOST is still my favorite show of all time...mostly for its story-line and entertainment value. But Breaking Bad is second with much better character development/writing/etc.
Lost was no where even close to BB. Lost just got silly at the end as I think the writers were struggling to find a way to wrap it up. BB was just perfect the entire way. And I really really loved lost. But the finale was so bad that it just ruined the entire series.