I like them up high! Think about lifting the top of your coffee machine to pour in the water, you don't have to slide it! I'm trying to think of any other pros or cons...
hmmmm......

depends on whether you and your family can reach what you need in the cabinets.

Roughly, the standard is uppers 18" off the counters. There is debate about whether that should include the light-rail or not.

If your counters are 37", it's just as standard to go up 18" to the bottom of the cabinet without making any allowance for the light rail - making a total of 55" with an open clearance of around 16.5".

You might own some appliance which would play a part, so look carefully at not only what you currently own, but roughly how big "whatever" is - like how large are mixers or coffee pots or microwaves - but you can go with 15-17" between the counter and the uppers (again without the light rail) if that makes the kitchen work better.

Factor in your larger appliances, too. Something like an OTR micro might hang down too low or an over the ref cabinet might not come in the right height.

Thanks much! I think I'll lower them to 18" and that will gain me 1 1/2" lower. Its amazing what a difference that will be. Thanks Again!

Until we redid our kitchen in the 1970s, I lived in the kitchen of a tall person who had nonstandard lower cupboards. I always felt that she was there behind me, berating me for my height and making life tough for me. The feeling that something is wrong won't go away even if you get used to it.