Sketch is a bit nasty for freehand drawing. I'm very much not a Corel Draw fan, but loved Freehand when it was still around. Illustrator still lags Freehand of ten years ago in a lot of respects.
Affinity looks very promising.
Affinity looks very promising.
Illustrator today has far more functionality (largely borrowed from Photoshop) than Freehand did, but Freehand had better core functionality than Illustrator (and it also introduced many of the features now in Illustrator, e.g. booleans).
Actually, if you're curious, just google freehand vs. illustrator -- it's pretty depressing how they compare despite freehand being 10 years old.
e.g.