I'm living in an apartment, and after I water my plants the water goes to plates below the pots. The pots are in a metallic structure above the plates, so I can take the plates to reuse the water (throwing it at the plants again).
This reuse seems beneficial, because I think I can get rid of mosquitoes that would reproduce in the stagnated water. And also some nutrients of the soil (as well as earthworms) can return to the vase.
Is there some negative points in doing that?
EDIT: I think I must add that I'm at 3 degrees of latitude, in a hot and humid tropical rainforest, where the precipitation used to be around 1700 mm. So I use lots of water everyday, more than once a day sometimes, so the reused water is a small fraction of the water used.