Those are some pretty big pots for them to be going dry so fast. What type of soil are you using?
Yea you're right, every plant is different, but from what I've experienced so far, every 4-5 days or so is about time for them to be watered again. I can even get away with 6 days sometimes. I've never encountered someone that has to water every single day yet.
Mine are in 3.5 gallon pots.