I’ve seen this question on this message board a few times -or at least related questions & it seems that as with everything, it’s unique to each person. My 2 1/2 year old (SWCAH) also loves water -over everything else.  He just started drinking juice this past year & although he likes it with meals, he also wants water at the meal.  He drinks water throughout the day -and loves salty things like pretzels.  Our assumption was it was CAH related -and then came our 2nd son -also SWCAH.  He’s only 8 months old, but he doesn’t seem to love water.  We always gave our 2yr old water w/his meds, right from the beginning in the syringe.  So, that’s how we started with our 2nd son, but he was always spitting it back at us.  Then he got colic & we started using gripe water -which had an apple flavor.  He loved it!! Once we stopped the gripe water, he was back to spitting his meds at us.  Now we give it to him with juice.  It will be interesting to see how this turns out as they grow up. So, who knows truly?  But my guess would be it may be CAH related.  I’m just glad it’s water they like so much!! -and my first son also favors healthy snacks over everything else -loves cheese, fruit,... (he didn’t get that from me :)