Forgot about everything and play it musically
In practicing them, I think that the first goal should be to make them even (tempo and dynamics) and relaxed. To me, clean and easy scales is a good starting point for variations. I think of 'clean' as a musical value, a sort of idealized sound to aim for, each note clear as a bell, easy to hear.
rc,By what I gather, scales are just patterns, musical building blocks. Which implies that thay are NOT pieces of music by themselves.
So they ARE purely technical exercises. At least by my pov. "Easy" is good, but I don't find musical value in "clean" at all! Further, I don't hear that in any music, but if you give me recordings of exercises maybe I'd have an idea. An aural idea of the sound is what I need. Talking can only do so much.
My idea of music is like waves. Not static, always going some direction. Even if you give me a score with no dynamic markings at all, for sure I'll do some variations. For starters, accents on some beats, usually the 1st of every bar. Then slow down and get softer at the end usually.The first few months I learned pieces, and not much exercises. So that is how I play. I can play melodies, but not scales.
Some days, I do some goal-oriented stuff. For my requirements. Study a scale for 10-20 minutes, that's it. No metronome since I find it hard to follow. Half the time I'm out of tempo. Just do whatever with the scale for 10 minutes. Generally, I do exercises in 10 minute intervals, and I'm exhausted after an hour. It feels like hard work! I also give myself a treat after that....I thought getting a better technique would cut the time and effort, now I don't know. It doesn't click. I'm trying to find the right balance here, for best results. Usually when I get compulsive, my concentrated brain isn't working and I have to do something I had previously memorized. e.g. C Major scale, an easy piece, or Hanon 1. I don't know if that is good or not.
To be clear, I think it's perfectly natural to not want to practice scales in the earlier stages of learning! Nobody starts piano wanting to play scales I came to piano to learn Beethovens sonatas, the first thing I did was try and learn the Tempest sonata, when that got too hard I thought maybe the Waldstein would be easier I learned the first few bars of a lot of advanced pieces before I decided maybe I could start with easier music.