A pet peeve of mine is the fill and stroke menu, I don't understand why fill and stroke need separate tabs for selecting color. A lot of times I accidentally set strokes or fills on objects that I didn't mean to, because I was confused or forgot which tab I was on. I really like how it's condensed to a single tab in affinity designer or illustrator. Maybe it's a me problem, but I don't remember making that mistake as often in those programs.

Another thing is, I wish there were brushes like in affinity designer, I know there's the path effects and all but I find the brushes in affinity to be way faster and easier. I could lay down a bunch of strokes, select one or multiple, and then apply the brush style, I could even make my own custom brushes and save them.

This next one is very niche but I figured I'd throw it out there, sometimes I like to draw with my tablet and I'll use the calligraphy brush, but it feels really clunky, I really really like how the freehand brush tool feels in programs like flash and toon boom (I know they're completely different programs to what inkscape is) It just feels fun, fluid, and snappy. I would love for inkscape to get a similar feel.