The hard parts for me are finding good arrangements, making stuff sound good in a mix, writing lyrics, finding ways to do certain non trivial things in my DAW, reviewing what software I want to purchase, ... Stuff like that.
It doesn't involve much focused dedicated practice. It's just too general of an activity, and it's very easy compared to playing classical pieces on a piano.
But how fun/relaxing it is can differ between instruments and between genres (baroque vs folk or blues) and approaches (e.g. strict sheet music interpration vs improvisation).
Also working with the DAW is more like composing, arranging, conducting, and producing/mixing than playing an instrument.
The best example of "relaxed piano playing" I can think of is actually the old Build Mode music from The Sims[0]. I'm 90% sure that all those piano tracks are just someone messing around improvising over a few simple chords, because it sounds so much like what comes out when I'm doing the same kind of thing.
Now, it's always a little stressful to record that kind of playing because if you play something bad sounding then you'll have to start over (or at least, splice multiple takes together), but if you're just playing the piano for fun, I think it mostly is relaxing.
Have you ever tried just playing some chords in the left hand and kind of letting the right hand do what it feels like?
[0] Here's Build 3 for example: https://www.youtube.com/watch?v=8gGHQicQUw4
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Edit: Looks like that YouTube video actually links to an article which confirms my old suspicion that it's improv piano:
> "When Russo and Martin couldn't quite capture that wistfulness themselves, they called Burr. A successful jazz pianist in his own right as well as a highly sought-after session musician, he was comfortable working off of Martin's ideas (and, unlike Russo, he was a pianist by trade rather than a saxophonist). Burr says he loved the cut-and-paste style of recording that Martin employed. It was a case, he says, of "just looking at Jerry and asking, 'Does this sound like what you want?'" So, while Russo went away and worked on his pieces only to see them chopped up by Martin, Burr was happy improvising."
Perhaps you play classical or learn pieces and paly them as is? (as you speak of "memorization" and "note-by-note and phrase-by-phrase analysis").
Try something like jazz, improvisation, etc - it can be inifinitely more relaxing, and much less taxing (you study to get the general technique for something, and then you can apply it in any way you like, be lax about it, switch things around, and so on).
I can't understand this at all.
I've been playing piano for 50+ years. Still practice every day. Play in amateur recitals. It's fun, but hardly relaxing. It's a lot of work, concentration, and study. And as I get older it gets more challenging because of physical limitations (movement, eyesight, hearing) that I have to work around. My fingers don't work like they used to, and sometimes I have to decide to leave out a note, or move something to a different hand, etc. Painstaking note-by-note and phrase-by-phrase analysis.
Memorization is also tough.