Persona 4 was such a drastic improvement over P3. I hope they continue with the improvement made. Besides the gameplay stuff, Persona 3 was just full of hateable characters.
Also, P4 had realistic situations. With P3, shit got too heavy while advancing the social links. Like, at level 1 they are like "gee whiz, I don't know if I'm fast enough to win the big race!" and by Level 7 they were like "...My step-dad is molesting my little brother, but I don't know what to do because my mother has cancer and needs his financial support to survive." I mean, come on! This isn't stuff you lob at a dude you've known a week.
Plus, the social links were so finicky. They'd be like "MC, I don't know how to feel about myself." and your choices would be like:
1. That's okay, we all feel like that sometimes.
2. You should feel like a stupid whore, because that's how I feel about you.
3. You are about to feel my palm across your face if you don't shut up.
And you'd pick 1, and they'd be like "I never asked for your sympathy! I hate you!" Next thing you know, your card is upside down.
Stuff like this didn't happen in 4.