Question: what is the micro-donk flatting range, other than the obvious limp/calling range of pp's and sc's?

I suck at poker, for sure, but I don't limp or flat call much. So when it comes to thinking about cold calling ranges that are wide (say > 10%), I'm lost.

When a player flat calls PFR's 20%+ (I've seen 40% several times lately), what types of hands are you putting in there? Do the fish all school around certain types of hands, or is there wide variation?