I'll put my thoughts on this post as it showed up as I scrolled to get to the one from a day or two ago...I have 5 different Lemmy apps installed right now. Figure that there is going to be a lot of experimentation and work being done right now, so it's nice to see what everyone is doing.
Jerboa - Personally, I really like Jerboa. Being the most mature of the bunch shows. It's well laid out, has just enough UI options, and works. Except that now Beehaw isn't on v0.18.
Connect - Not open source at this time, I get why that matters to people, but not a deal breaker for me. Typing this comment in Connect. Just updated this morning with additional and redesigned settings. There is about a thumbs width of space between this comment box and my keyboard. That's kind of yucky.
Liftoff - I'm hopeful for this one. It LOOKS the best to me, but there's some weird UX issues. Biggest being that the only place to see your replies/notifications is the top of the Home feed with no quick way to get there if you've been scrolling.
Thunder - I can see the potential, but it's not for me right now. No buttons on comments, you have to use swipe gestures. But posts have buttons. Changing UI options doesn't actually change anything 95% of the time.
Summit - You want a zero frills, dark mode way of browsing and interacting? This is that. I'd love a FEW options (like light mode), but it's fast and easy. Uhh...just realized I can't find a way to make a new post...
Wefwef.app - Last one. Really slick looking and responsive, but too iOS-y for me. It also claims to have light mode, but I can't figure out how to switch it. Really polished though.
I've had the best luck with Liftoff so far. I used Jerboa for awhile until it kept crashing within seconds of opening it. Not sure how much this affects it, but I'm using GrapheneOS instead of stock Android on a Pixel 6