I used Manjaro the last years. Before I was using Arch + Deepin DE.
I loved Deepin because it is really good looking and their own software is great.
But Deepin has so many bugs coming and going... it is not reliable, unfortunately!
Manjaro once made my work machine unusable because of a failed Kernel and firmware update.
It felt still too bleeding edge.
I was using Cinnamon at last as I don't like all the others like KDE and Gnome. XFCE and LXQT lacking too much. But Cinnamon takes memory and cpu... no transparency on the panel and I don't know. Simply not perfect.
I had a look at Budgie a few years ago but it was too simple back then. I then went to DDE.
But now Budgie got interesting again, but I didn't want to use it on a manjaro but rather "natively" on its own os.
So now it is Solus. It is stable and comes with a decent default config. Far from being perfect though it does what it should and it looks very neat.