>>5959469I think there's a balance to be found: the transparency of watercolors is nice, but being autistic about solely using the paper's white has little value but to show off or get recognition from people who value this. But 99% of collectioners won't care, at all.
Reasonable use of transparent washes & opaques considering local needs seems to be the best option, and that's mostly how "watercolor", for lack of a better name, was used in the past (e.g Sargent).
>>5959132Besides some of the already mentioned answers, botanical art is great, not too demanding drawing wise, colorful, variety in textures, "easy" subjects, etc. Technically-wise, it's a great exercice.
Just grab a dead leaf and try to copy it accurately.
Also, Chinese/Asian paintings.