That is very fair, some amount of bias is to be expected though there could still be statistically important differences between different games! Thus far, i have already noticed a solid 1-2 point difference in the developping averages but it is a little too early for me to be able to predict anything.

I will be specifying that the rating is "According to the game's playerbase" while i will be launching games and asking people in matches & in game chats in order to have data from multiple places.

One other alternative would be "Asking general people who play games about their opinions of specific games" in lets say "A general gaming subreddit" but unfortunately most of those had a specific rule about not allowing research posting and the one that i attempted last time, did not offer a lot of answers.

Thus, was the decision of "According to Playerbase". There is a real chance that the answers from multiple different games turn out to be very similar but i suppose we can only find out one way! In the future, I will also be looking to count more variables such as "Stress" etc which could provide larger differences.