Since you seem to enjoy music, I would give you the advice to focus very closely on your technique at all times and to focus on [nurturing] it. For it is your technique that gives you entrance in the world of music. What I mean by the world of music is the imaginary world of creativity that has endless possibilities!
As far as technique goes, I mean this: How do you really think that you should play that (one) key? If you stumbled upon a piano and had nothing to worry about but that instrument and your perception of it, then how would you play each single note? Not based on your teacher's opinion, nor on some concert pianist's opinion, nor on the technitian's opinition, but based on your own enjoyment of the instrument's presence? That determines everything.
Haha, my bad, but do listen to your master piano teacher. Technique is first learned on the order of one note. Then on multiple notes put together. But in the end it all points back to giving each finger due respect as it plays it's own one note. If you can play one key by itself, then you can play one key from another key. And you can also play those three keys together to make rythms. But remember! There's no right or wrong, just creativity. And this creativity pulls everything together to yield perfect, relaxed technique.
So I guess create own technique but still every once and a while look back at the master's (Yundi Li, Daniil Trifinov, Grosvenor, your teacher or local musician, ect...) to get new ideas...