I have melon in my car at the moment and its nice and mild. I did have bubblegum, and was quite obsessed by it, to the point where i ordered another 3 to have around my flat, to make my flat bubblegum smelling.
Then something strange happended. After a few days I fell violently ILL and was off work for 4 days lobbing up, I couldnt seem to get over the sickness and nausea. I developed an association with the bubblegum flavour that makes me want to GAG, and as soon as i binned all 3 air fresheners, i felt better.
Moral of the story for me - to not be a noob and have a bubblegum smelling flat.