Over the years XFCE is the DE I’ve used the most. Kept getting back to it. It simply does a lot of things right. That does not mean it’s my favorite, though. There are plenty of good ones out there. LXqt is one I find to be excellent, but it does not get much attention. Enlightenment too, for that matter. Enlightenment feels like it comes from a different era, but it’s quite charming. That said, I think I’m finished with these “small” environments, and will be on KDE from now on. You get the “batteries included” experience, and things generally work very well together. Sure, maybe it’s a bit more resource heavy, but I can’t say I notice.