I set my guitar necks very straight, and I have as low action as I can without the strings buzzing. Sometimes this requires a fret job, to get it comfortably set up. I use daddario phosphor bronze 12-53.
Sometimes, when you feel disappointed with the sound and feel, it can simply be because of the guitar - but you might not know exactly what you're looking for in a guitar.
Did you try many different guitars yet, or do you feel like you've found the right one?
Kind regards/Emil form Sweden