Thanks, piano! I have played many years, and I was taught from about age 10 to 17 with a lot of exercises. I did:
All the scales and arpeggios in different ways
Czerny school of velocity
Hanon, some Pischna (I don't recommend Pischna, it can do damage)
A lot of Bach--Inventions, some of the WTC (I think Bach really helps cleanness of articulation)
I never studied the Brahms 51, but I'm sure they are excellent.
After I went to college I had a different teacher who didn't stress exercises, but more repertoire. By then I had been pretty "exercised out" --but I already had the idea of clarity being of prime importance.
I no longer play Hanon, Czerny, etc--but I do go back and play Bach, or a Mozart sonata movement to warm up, and I play scales and arpeggios especially in the keys of any pieces I'm working on.
And as always, have fun!

Teresa