Giles Andreae's Purple Ronnie was around when I was growing up and I suppose it was kinda fun for kids to see a cartoon figure that was a very cheeky adult doing cheeky adult things in a tongue-in-cheek way. I like Purple Ronnie's style as he is drawn in such a simple way with smiles and bright colours and other stylings often present in children's books, but obviously is not a children's character. Purple Ronnie's personality transcends his simple style - although I suppose he is a simple character, but there is something very real about him - something recognisable as a part of every adult person. He is a bit like Rupert Fawcett's Fred or Ernie Bushmiller's Nancy in that respect, although those characters are more grumpy and exasperated in their interactions with life - Purple Ronnie is more of a silly celebration of life and the potentially disappointing or awkward parts of life e.g. sex, drinking, friends, etc.
Purple Ronnie is very uplifting as a character. Always smiling, there is no sadness in Purple Ronnie's world, even in the face of binge drinking or body self-consciousness. I doubt Purple Ronnie has any regrets.