No problem, thank you for reading the suggestions!
Some examples I thought of for the feedee personalities are an oblivious and innocent gainer who downplays it, a hardcore dominant gainer who is all about maximising her gains and a quirky or simple minded glutton who just lives to eat and grow fatter.
OH! Quick extra idea! Some new jobs that might fit with the feedee personality. Perhaps streaming could be a new profession, either gaming or mukbang. Food reviewer? Just chucking this in.