For me, it was perhaps simple-scan, a very simple and efficient GUI to scan documents. I used it with my Brother printer / scanner and it works like a charm. Especially since I do not scan stuff often, so a program with more complex UI would have the effect that I forget how to use it until the next time.
I’ve tried Ardour, but compared to Reaper, I unfortunately just can’t use it. Pd is fantastic though!! It’s what got me interested in music stuffs in college, man those are memories… making a drum kit in Pd was my first assignment, I remember suffering over the cymbal for hours and hours. Now I’m getting all nostalgic lol
Reaper is nifty, but it’s not FOSS, which would be the only reason why I’d give up Bitwig. (I know that’s not what the thread asked, but that’s my reason for not using Reaper.)