I've had this happen with my dreamie Merengue. She just seemed so bland once I went through several hoops to get her and plot reset her home. But in my other town I INSTANTLY clicked with Tia?? And I had two Flora's. The one in my main town was insufferable but the one in my 2nd town was pretty decent?? She wasn't as conceited as my first Flora???
I'm thinking it has to do with horoscopes! I know it affects villager to villager interaction but I'm thinking it also does for the players as well! Food for thought