I'm building a family tree through LibreOffice Draw
I didn't know that the connectors automatically draw lines from box to box! For years, I'd been seeking software that could do this. The line-connecting behavior is a bit weird and unpredictable, but it's still fun!
I like draw.io, but the killer feature I want is auto-layout. As soon as a flowchart gets a little complex, things get really fiddly. I wish I could hit 'auto-arrange' and it would do some approximation of a tidy layout.