I tend to play closed chords because I prefer the control. For me, open chords just happen and I use them for a change in dynamics. Here's an example from what I was doing the other day.
1. I was just grooving on the E minor (X777)
2. I slid up and played (0 0 0 10) and it sounded good. It sounded good because fretting that G resulted in an open C chord. C is the bVI of the scale I worked on, E Harmonic Minor.
3. After playing that C chord for a spell, I went finger style and using the G on the tenth fret, I walked up the fret board using the B Phrygian Dominant and the A Dorian #11 (both modes of the E Harmonic Minor) until I was back at the seventh fret, where I could play my E minor chord and start it all over again.
That is typical of me, I suppose. I went from a tight triad, to a big jangly open chord, to individual notes, and back to my triad. It looks very pre-meditated, but it really was completely emotional/instinctual. I didn't think about it. The heart wants what it wants. And at that time, it wanted an Open C major. But, as I said, it just happened. It was really more a matter of optics than anything else. I was playing that E minor chord and looked up the fretboard and put my pinky down just because it looked like a good place to land. It just so happened that I hit the G note, which is the bIII of my scale and it just worked. That was just serendipity. And that's how open chords find their way into my music.
Oh, and by the way, I would have done this regardless of the tuning, so that doesn't even enter into the calculus of my decision making process. I just so happened to be playing a linear tuned uke...but I was playing it like a re-entrant (i.e., playing the top three strings instead of the bottom three).