I'm pretty much in the same boat as you. I've tried a handful of 1x1's here, and either they got dropped on me or I ended up dropping them (which, if I did a 1x1 with you and dropped it and you're reading this, sorry!). I was much more used to doing groups than 1x1, so it took me a while to figure out what worked and didn't work for me personally. Even if I loved someone's plot idea, there was always something not clicking for me. When I started a 1x1 with my current partner, I took on a GM-role where I play most of the cast of NPCs. It's so much fun! I think for me, someone needs to be mostly in control of the narrative: either myself as a GM or the other person.