I never played PF1. My group just kept playing 3.5 when 4 came out, and we never played PF1. When 5th ed came out we moved to it and enjoyed it alot. However, I am a person who loves super high fantasy settings, and PF2 caught my attention early. Grabbed the playtest at gencon and have not looked back since. I joined PF society in September after the rules went live and am loving it. I play mostly casters (wizard mostly) and sometimes rangers or fighters. My groups that are in 5th ed games are split on switching, but most are willing to try PF2 when our current campaigns end.
My favorite aspects of PF2 are the way skills are implemented and the 3 action economy.