On mobile I'm always on Damus because it's the first reliable client I found and it has been fairly consistent over the year, with some hiccups here and there (nothing fatal).
When I'm on my desktop I typically go to Snort even when it doesn't work well, but lately it has been working a lot better with the latest updates.
I also frequent Iris, though it is very similar to Snort at times it has different features.
I guess I like Snort and Iris because they have a lot of my design (I designed them for myself), though still mismatching in some parts.