I'm a real Johnny-come-lately here - I just saw the Green Lantern film for the very first time (on Blu).  Well....I really liked this!  I know it got slammed by many over the years, but I felt it was fantastic - I have littte familiarity with GL (I maybe read 1-2 comics years ago), so maybe that helped here - since I didn't have a lot of pre-conceived ideas about the character or story.

As it stood, this seemed like a very good adaptation of the comic - the outfit was spot-on, the ring & it was also accurate how he could make things out of thin air, etc. The effects were great, and I felt the story was strong as well.  I especially liked:  The scene when GL saved the helicopter by attaching a go kart-like wheels to the wreckage & also making a racing track; the ending scene when GL saved the Earth from that huge monster, etc.

I was surprised that Sinestro was a "good" guy here - I guess he turns bad later, since IIRC he was GL's nemesis in the comic (or at least the old Superfriends cartoon, IIRC).