For Quench and Thirst it depends on your style. If you can kill enemies really fast then by all means take Thirst, as every time you kill something you get a drop filled.
However, most people find it easier to use Quench as then the water meter empties slower.
The main arguement for Thirst is that if you can kill things fast then there is no need to ever buy/have more than 2-3 water in case of emergency. --- "Has anyone really been even as decided to use even go want to do look more like?" - Some guy on 4chan