Hi! I was messing around with the e621 API and I made a little tool that compares your most favorited tags to an approximated site average (based on favorites from an annonymized collection of top posters). It plots a bar graph that shows your favorite tags (X axis), how much more you like them compared to the average user (Y axis), and what percentage of your favorited posts contains this tag (text on top of each bar).
The code is too sloppy to release this publicly, but send me a message or comment here and I can totally run it for you based on your public e621 profile
Here's what mine looks like https://postimg.cc/VJF1rRM5 :)