"In considering the use of grammar as a corrective of what are called ‘ungrammatical’ expressions, it must be borne in mind that the rules of grammar have no value except as statements of facts: whatever is in general use in a language is for that very reason grammatically correct."
[Henry Sweet, 1891.]
I was chastised gently (with a riding crop) by a colleague at work for using the word "flavourful" rather than the preferred "flavoursome".
Both appear to be words according to my dictionary and the internet, so is either one more "correct" than the other, or are they both ok?
I would suggest that adding the suffix -ful turns the word into a subjective meaning (it happened to me and this is what I think), while the suffix -some is objective and is attaching meaning to the object.