For example a player with stats of 60/8 is very LAGGY (Loose and Aggressive), a player with stats of 8/2 is "Weak/Tight" and a player with stats of 6/12 is TAGGY (Tight, but Aggressive).
These are all wrong, way off and not even close. 60/8 is a fish to the Nth degree. You can't be 6/12 ever because you can't raise more hands than you play and 8/2 is nitty.

The PFR% that you refer to has nothing to do with aggression in the sense that you are using it.
I also have rarely if ever seen a player <10% VP$P so to call that tight and have a broad range of 10%-30% as average does nothing to define a player.