There are some things that have come pretty easy for me on violin, intonation, timing, reading sheet music while other things are taking just as much time as for anyone else (getting relaxed in that obnoxious posture, vibrato, and some aspects of bowing). Last year I had picked up violin again after a couple of decades of not playing, but around this time I also ended up setting it aside for a bit to work on a bunch of material on guitar for an orchestra.
Well, my silly ADHD brain did what it does, and latched on to guitar, and only over the last month or so I have started picking up the violin again regularly. I did pick it up now and then, like once or twice a week, but not really enough to work on things enough to actually make progress. But over the last month I have been picking it up a lot more, and still have the struggle of balancing time between multiple instruments, but violin has taken its' place for the time being as Galactus, although devourer of time instead of worlds.
Tonight, I picked up the guitar seriously for the first time in a few weeks, and I discovered that I was a lot more relaxed playing, and that is something I struggled with for years on guitar. I played for years, and it was always a challenge for me, probably due to the way I learned really poorly 'self taught' and constantly have to work at - not tensing up and playing with too much tension. And for me, that is unique to guitar, I don't have that issue with other instruments, only guitar. :O
I think I want to find a way to tap in to this, and see what I can gain and get 'more bang for my buck' on practice time and seeing how I can apply it to other instruments.