These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Heartwarming Moments - The little loving smile that appear's on Corben's face when he realizes his mom is on the phone, even though she is already in the middle of a thorough rant complaining about her son. It's just nice to see a son loving his mother, and enjoying talking...er...listening....to her, despite the fact that she keeps criticizing him.
So Bad, It's Good: The film is not bad per se, but the whole is far, far greater than the sum of its parts.
Special Effects Failure: Either because of shoddy editing or fun, the "unbreakable" glass container Leeloo breaks out of clearly has a nice circle of breakaway glass, visible for at least a second before she actually punches it.
The black stuff running down Zorg's head is creepy and all, but it REALLY looks like chocolate syrup - which is probably was, especially when smeared.
What an Idiot: No one thinks to tell the police that they are chasing an incredibly valuable lab subject that needs to be preserved. As a consequence she is nearly killed when a trigger-happy cop duo decides to shoot Corben's car down on the mere suspicion of being a car thief.